The backbone of sphingomyelin is sphingosine, an amino alcohol formed from palmitate and serine. The amino terminal is acylated with a by a long-chain acyl CoA to yield ceramide. Subsequent substitution of the terminal hydroxyl group by phosphatidyl choline forms sphingomyelin. Sphingomyelin is present in all eukaryotic cell membranes, and is particularly concentrated in the nervous system because sphingomyelin is a major component of myelin, the fatty insulation wrapped around nerve cells by Schwann cells. Multiple Sclerosis is a disease characterised by deterioration of the myelin sheath ...

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Phospholipid, Phospholipid - Phosphoglycerides, Phospholipid - Phosphatidyl choline, Phospholipid - Phosphatidyl ethanolamine, Phospholipid - Phosphatidyl inositol, Phospholipid - Phosphatidyl serine, Phospholipid - Diphosphatidyl glycerol, Phospholipid - Synthesis, Phospholipid - Sphingomyelin, Phospholipid - Amphipathic character

Read more here: » Phospholipid: Encyclopedia II - Phospholipid - Sphingomyelin

Bioelectromagnetics - Powerlines. Bioelectromagnetics - CRTs. Bioelectromagnetics - Cell phones. Bioelectromagnetics - Radar. Bioelectromagnetics - Other transmitters radio TV .... ...

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Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Effects of artificial fields

Bioelectromagnetics - Calcium efflux. Bioelectromagnetics - Neurotransmitter systems. Bioelectromagnetics - DNA strand breaks and genotoxicity. Bioelectromagnetics - Ornithine decarboxylase. Bioelectromagnetics - Melatonin. Bioelectromagnetics - Bacterial growth and metabolism. ...

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Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Effects on the level of a cell or below

Bioelectromagnetics - Blood-brain barrier permittivity. Bioelectromagnetics - EEG changes. Bioelectromagnetics - Wound healing regeneration and bone growth. Bioelectromagnetics - Cancer promotion. ...

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Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Effects on the level of an organ or system

Bioelectromagnetics - Membrane polarization. Bioelectromagnetics - Electrorotation. Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance. Bioelectromagnetics - Nonlinear kinetics. Bioelectromagnetics - Frohlich-style macro dipole interactions. Bioelectromagnetics - DNA conduction. Bioelectromagnetics - Microtubule waveguides. ...

See also:

Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Primary interaction mechanisms

Bioelectromagnetics - Thermal vs nonthermal nature. Most of the molecules that make up the human body interact only weakly with electromagnetic fields (EMF) that are in the radiofrequency or extremely low frequency bands. One basic interactiion is the absorption of energy from the EMF, which can cause tissue to heat up; more intense field exposures will produce greater heating. This heat deposition can lead to biological effects ranging from discomfort to protein denaturation to burns. Many nations and regulatory ...

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Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Introduction: general features of observed interactions

All cells have proteins attached to their membranes and they are responsible for performing a vast array of functions. There are several ways for proteins to be attached to a cell membrane. PNH occurs as a result of a defect in one of these mechanisms. A molecule called PIGA (phosphatidylinositol glycan A) is needed to make a cell membrane anchor for proteins called GPI (glycosylphosphatidylinositol). The gene that codes for PIGA is inherited in an X-linked fashion, which means that only one active copy of the gene for PIGA may exist. ...

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Paroxysmal nocturnal hemoglobinuria, Paroxysmal nocturnal hemoglobinuria - Signs and symptoms, Paroxysmal nocturnal hemoglobinuria - Diagnosis, Paroxysmal nocturnal hemoglobinuria - Classification, Paroxysmal nocturnal hemoglobinuria - Pathophysiology, Paroxysmal nocturnal hemoglobinuria - Treatment, Paroxysmal nocturnal hemoglobinuria - History, Paroxysmal nocturnal hemoglobinuria - External link

Read more here: » Paroxysmal nocturnal hemoglobinuria: Encyclopedia II - Paroxysmal nocturnal hemoglobinuria - Pathophysiology

Bioelectromagnetics - Electrical sensing organs fish etc. Bioelectromagnetics - Navigation bees pidgeons etc. Bioelectromagnetics - Effects on embryonic development. Bioelectromagnetics - Behavioral effects. Many subtle, and at times, not-so-subtle effects on behaviour have been reported from exposure to magnetic fields, with a particular focus in research on pulsed magnetic fields. The specific pulseform used appears to be an ...

See also:

Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Whole-organism effects

Bioelectromagnetics - Bone fracture healing. Bioelectromagnetics - TMS and related. A strong changing magnetic field can induce electrical currents in conductive tissue, such as the brain. Since the magnetic field will penetrate tissue, it can be generated outside of the head to induce currents within, hence Transcranial magnetic stimulation. These currents will depolarize parts of the brain, leading to changes in the patterns of neural activation. Essentially, it is a form of electro ...

See also:

Bioelectromagnetics, Bioelectromagnetics - Introduction: general features of observed interactions, Bioelectromagnetics - Thermal vs nonthermal nature, Bioelectromagnetics - Noise-masking time and space integration cooperativity, Bioelectromagnetics - Intrinsic fields, Bioelectromagnetics - Natural fields, Bioelectromagnetics - Primary interaction mechanisms, Bioelectromagnetics - Membrane polarization, Bioelectromagnetics - Electrorotation, Bioelectromagnetics - Ion cyclotron resonance and ion parametric resonance, Bioelectromagnetics - Nonlinear kinetics, Bioelectromagnetics - Frohlich-style macro dipole interactions, Bioelectromagnetics - DNA conduction, Bioelectromagnetics - Microtubule waveguides, Bioelectromagnetics - Ferromagnetic domains, Bioelectromagnetics - Frequency selectivity from spatial features, Bioelectromagnetics - Effects on the level of a cell or below, Bioelectromagnetics - Calcium efflux, Bioelectromagnetics - Neurotransmitter systems, Bioelectromagnetics - DNA strand breaks and genotoxicity, Bioelectromagnetics - Ornithine decarboxylase, Bioelectromagnetics - Melatonin, Bioelectromagnetics - Bacterial growth and metabolism, Bioelectromagnetics - Effects on the level of an organ or system, Bioelectromagnetics - Blood-brain barrier permittivity, Bioelectromagnetics - EEG changes, Bioelectromagnetics - Wound healing regeneration and bone growth, Bioelectromagnetics - Cancer promotion, Bioelectromagnetics - Whole-organism effects, Bioelectromagnetics - Electrical sensing organs fish etc, Bioelectromagnetics - Navigation bees pidgeons etc, Bioelectromagnetics - Effects on embryonic development, Bioelectromagnetics - Behavioral effects, Bioelectromagnetics - Effects of artificial fields, Bioelectromagnetics - Powerlines, Bioelectromagnetics - CRTs, Bioelectromagnetics - Cell phones, Bioelectromagnetics - Radar, Bioelectromagnetics - Other transmitters radio TV ..., Bioelectromagnetics - Medical applications, Bioelectromagnetics - Bone fracture healing, Bioelectromagnetics - TMS and related, Bioelectromagnetics - Low-level Laser Therapy LLLT, Bioelectromagnetics - Strong magnetic pulses for disinfection, Bioelectromagnetics - Other

Read more here: » Bioelectromagnetics: Encyclopedia II - Bioelectromagnetics - Medical applications

Most commonly the function of IMPs is to act as a transporter for various molecules that would otherwise not be able to move across the cell membrane. When used as a transporter, its most common configuration is to have an extra-cellular domain and a cytoplasmic domain separated by a non-polar region that holds it tightly in the cell membrane. Examples of the other functions that integral membrane proteins serve include the identification of the cell for recognition by other cells, the anchoring of one cell to another or to surrounding media, and the initiation of intracellular responses to external ...

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Integral membrane protein, Integral membrane protein - Structure, Integral membrane protein - Transmembrane, Integral membrane protein - Membrane-associated, Integral membrane protein - Lipid-linked, Integral membrane protein - Function, Integral membrane protein - Types

Read more here: » Integral membrane protein: Encyclopedia II - Integral membrane protein - Function

From the viewpoint of biophysics, there is nothing particularly special about the resting membrane potential. It is merely the membrane potential that results from the membrane permeabilities that predominate when the cell is resting. At any given moment, there are two factors for an ion that determine how much influence that ion will have over the membrane potential of a cell. That ion's "driving force" and, That ion's permeability Intuitively, this is easy to understand. If the driving force is hi ...

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Membrane potential, Membrane potential - The Ionic Basis of the resting potential, Membrane potential - Generation of the resting potential, Membrane potential - The number of ions involved in generating the resting potential, Membrane potential - Equilibrium potentials, Membrane potential - Resting potential revisited, Membrane potential - All other values of membrane potential, Membrane potential - Effects and implications

Read more here: » Membrane potential: Encyclopedia II - Membrane potential - All other values of membrane potential

While cells expend energy to transport ions and establish a transmembrane potential, they use this potential in turn to transport other ions and metabolites such as sugar. The transmembrane potential of the mitochondria drives the production of ATP, which is the common currency of biological energy. Cells may draw on the energy they store in the resting potential to drive action potentials or other forms of excitation. These changes in the membrane potential enable communication with other cells (as with action potentials) or initiate changes inside the ...

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Membrane potential, Membrane potential - The Ionic Basis of the resting potential, Membrane potential - Generation of the resting potential, Membrane potential - The number of ions involved in generating the resting potential, Membrane potential - Equilibrium potentials, Membrane potential - Resting potential revisited, Membrane potential - All other values of membrane potential, Membrane potential - Effects and implications

Read more here: » Membrane potential: Encyclopedia II - Membrane potential - Effects and implications

At its core, the genesis of every resting membrane potential is some sort of ion pump, exchanger or transporter. Any voltage, membrane potentials included, is a separation of charges across a resistive barrier. The typical membrane potential of a cell arises from the separation of potassium ions from intracellular immobile anions across the membrane of the cell. In order for this separation to occur, a concentration gradient of potassium ions must first be set up. While most descriptions of the genesis of membrane potential begin with ...

See also:

Membrane potential, Membrane potential - The Ionic Basis of the resting potential, Membrane potential - Generation of the resting potential, Membrane potential - The number of ions involved in generating the resting potential, Membrane potential - Equilibrium potentials, Membrane potential - Resting potential revisited, Membrane potential - All other values of membrane potential, Membrane potential - Effects and implications

Read more here: » Membrane potential: Encyclopedia II - Membrane potential - The Ionic Basis of the resting potential

At its core, the origin of every resting membrane potential is some sort of ion pump exchanger or transporter. Any voltage - membrane potentials included - is a separation of charges across a resistive barrier. The typical membrane potential of a cell arises from the separation of potassium ions from intracellular immobile anions across the membrane of the cell. In order for this separation to occur, a concentration gradient of potassium ions must first be set up. While most descriptions of the genesis of membrane potential begin with ...

See also:

Membrane potential, Membrane potential - The Ionic Basis of the resting potential, Membrane potential - Generation of the resting potential, Membrane potential - The number of ions involved in generating the resting potential, Membrane potential - Equilibrium potentials, Membrane potential - Resting potential revisited, Membrane potential - All other values of membrane potential, Membrane potential - Effects and implications

Read more here: » Membrane potential: Encyclopedia II - Membrane potential - The Ionic Basis of the resting potential

Signal transduction - Transmembrane receptors. Transmembrane receptors are proteins that span the thickness of the plasma membrane of the cell, with one end of the receptor outside (extracellular domain) and one inside (intracellular domain) the cell. When the extracellular domain recognizes the hormone, the whole receptor undergoes a structural shift that affects the intracellular domain, leading to further action. In this case the hormone itself does notSee also:

Signal transduction, Signal transduction - Overview, Signal transduction - Stimuli, Signal transduction - Responses, Signal transduction - Types of signals, Signal transduction - Extracellular, Signal transduction - Intracellular, Signal transduction - Intercellular, Signal transduction - Hormones, Signal transduction - Types of receptors, Signal transduction - Transmembrane receptors, Signal transduction - Nuclear receptors, Signal transduction - Signal amplification, Signal transduction - Signal amplification at the transmembrane hormone receptor, Signal transduction - Intracellular signal transduction, Signal transduction - Ca2+ as a second messenger, Signal transduction - Lipophilic second messenger molecules, Signal transduction - Nitric oxide NO as second messenger, Signal transduction - Research questions, Signal transduction - Further information, Signal transduction - Bibliography, Signal transduction - Sources used in article or earlier version, Signal transduction - External links

Read more here: » Signal transduction: Encyclopedia II - Signal transduction - Types of receptors

In the archetypal example of a hydrogen/oxygen proton-exchange membrane (or "polymer electrolyte") fuel cell (PEMFC), a proton-conducting polymer membrane separates the anode and cathode sides. Each side has an electrode, typically carbon paper coated with platinum catalyst. On the anode side, hydrogen diffuses to the anode catalyst where it dissociates into protons and electrons. The protons are conducted through the membrane to the cathode, but the electrons are forced to travel in an external circuit (supplying power) because the ...

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Fuel cell, Fuel cell - Science, Fuel cell - Efficiency, Fuel cell - Economy, Fuel cell - History, Fuel cell - The fuel cell industry, Fuel cell - Advantages and disadvantages, Fuel cell - Environmental effects, Fuel cell - Fuel cell design issues, Fuel cell - Fuel cell applications, Fuel cell - Hydrogen vehicles and refuelling, Fuel cell - Suggested applications, Fuel cell - Types of fuel cells, Fuel cell - Related Technologies

Read more here: » Fuel cell: Encyclopedia II - Fuel cell - Science

SNAREs are small, abundant and mostly plasma membrane-bound proteins. Although they vary considerably in structure and size, all share a segment in their cytosolic domain called a SNARE motif that consists of 60-70 amino acids that are capable of reversible assembly into tight, four-helix bundles called "trans"-SNARE complexes. The readily-formed metastable "trans" complexes are composed of three SNAREs: syntaxin 1 and SNAP-25 resident in cell membrane and synaptobrevin 2 (also referred to as vesicle-associated membrane pro ...

See also:

SNARE protein, SNARE protein - SNARE structure, SNARE protein - SNARE complexes, SNARE protein - Proposed mechanism of membrane fusion

Read more here: » SNARE protein: Encyclopedia II - SNARE protein - SNARE structure

Substances that have the ability to oxidize (Commonwealth English oxidise) other substances are said to be oxidative and are known as oxidizing agents, oxidants or oxidizers. Put in another way, the oxidant removes electrons from the other substance, and is thus reduced itself. Oxidants are usually chemical substances with elements in high oxidation numbers (e.g. H2O2, MnO4-, CrO3, Cr2O72-, OsO4) or hig ...

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Redox, Redox - Oxidizing and reducing agents, Redox - Oxidation in the industry, Redox - Former meaning oxygen/hydrogen, Redox - Examples of redox reactions, Redox - Other examples, Redox - Redox reactions in biology

Read more here: » Redox: Encyclopedia II - Redox - Oxidizing and reducing agents

A good example is the reaction between hydrogen and fluorine: H2 + F2 → 2HF We can write this overall reaction as two half-reactions: an oxidation reaction: H2 → 2H+ + 2e- and a reduction reaction: F2 + 2e- → 2F- Elements always have an oxidation number of zero. In the first half reaction hydrogen is oxidized from an oxidation number of zero to an oxidation number of +1. In the second half reaction fluorine is reduced from an oxi ...

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Redox, Redox - Oxidizing and reducing agents, Redox - Oxidation in the industry, Redox - Former meaning oxygen/hydrogen, Redox - Examples of redox reactions, Redox - Other examples, Redox - Redox reactions in biology

Read more here: » Redox: Encyclopedia II - Redox - Examples of redox reactions

The filament is composed of the protein flagellin and is a hollow tube 20 nanometers thick. It is helical, and has a sharp bend just outside the outer membrane called the "hook" which allows the helix to point directly away from the cell. A shaft runs between the hook and the basal body, passing through protein rings in the cell's membranes that act as bearings. Gram-positive organisms have 2 basal body rings, one in the peptidoglycan layer and one in the plasma membrane. Gram-negative organisms have 4 rings: L ring associates with the lipop ...

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Flagellum, Flagellum - Bacterial flagellum, Flagellum - Archaeal flagellum, Flagellum - Eukaryotic flagellum

Read more here: » Flagellum: Encyclopedia II - Flagellum - Bacterial flagellum

Much biological energy is stored and released by means of redox reactions. Photosynthesis involves the reduction of carbon dioxide into sugars and the oxidation of water into molecular oxygen. The reverse reaction, respiration, oxidizes sugars to produce carbon dioxide and water. As intermediate steps, the reduced carbon compounds are used to reduce nicotinamide adenine dinucleotide (NAD+), which then contributes to the creation of a proton gradient, which drives the synthesis of adenosine triphosphate (ATP) and is maintained by the reduction of oxygen. In animal cells, mitochondria perform simil ...

See also:

Redox, Redox - Oxidizing and reducing agents, Redox - Oxidation in the industry, Redox - Former meaning oxygen/hydrogen, Redox - Examples of redox reactions, Redox - Other examples, Redox - Redox reactions in biology

Read more here: » Redox: Encyclopedia II - Redox - Redox reactions in biology

Substances that have the ability to oxidize (Commonwealth English oxidise) other substances are said to be oxidative and are known as oxidizing agents, oxidants or oxidizers. Put in another way, the oxidant removes electrons from the other substance, and is thus reduced itself. Oxidants are usually chemical substances with elements in high oxidation numbers (e.g., H2O2, MnO4-, CrO3, Cr2O72-, OsO4) or hi ...

See also:

Redox, Redox - Oxidizing and reducing agents, Redox - Oxidation in the industry, Redox - Former meaning oxygen/hydrogen, Redox - Examples of redox reactions, Redox - Other examples, Redox - Redox reactions in biology

Read more here: » Redox: Encyclopedia II - Redox - Oxidizing and reducing agents