Homeostasis is the property of an open system, especially living organisms, to regulate its internal environment to maintain a stable, constant condition, by means of multiple dynamic equilibrium adjustments, controlled by interrelated regulation mechanisms. The term was coined in 1932 by Walter Cannon from the Greek homo (same, like) and stasis (to stand, posture). Homeostasis - Overview. The term is most often used in the sense of biological homeostasis. Multicellular organisms require a hom ...

Including:

• Homeostasis - Overview
• Homeostasis - Properties of homeostasis
• Homeostasis - Mechanisms of homeostasis: feedback
• Homeostasis - Ecological homeostasis
• Homeostasis - Biological homeostasis
• Homeostasis - Homeostasis in the human body
• Homeostasis - Other fields
• Homeostasis - Examples

Read more here: » Homeostasis: Encyclopedia - Homeostasis

See also:

Homeostasis, Homeostasis - Overview, Homeostasis - Properties of homeostasis, Homeostasis - Mechanisms of homeostasis: feedback, Homeostasis - Ecological homeostasis, Homeostasis - Biological homeostasis, Homeostasis - Homeostasis in the human body, Homeostasis - Other fields, Homeostasis - Examples

Read more here: » Homeostasis: Encyclopedia II - Homeostasis - Overview

Homeostasis is one of the fundamental characteristics of living things. It is the maintenance of the internal environment within tolerable limits. The internal environment of a living organism's body features body fluids in multicellular animals. The body fluids include blood plasma, tissue fluid and intracellular fluid. The maintenance of a steady state in these fluids is essential to livin ...

See also:

Homeostasis, Homeostasis - Overview, Homeostasis - Properties of homeostasis, Homeostasis - Mechanisms of homeostasis: feedback, Homeostasis - Ecological homeostasis, Homeostasis - Biological homeostasis, Homeostasis - Homeostasis in the human body, Homeostasis - Other fields, Homeostasis - Examples

Read more here: » Homeostasis: Encyclopedia II - Homeostasis - Biological homeostasis

He developed the concept of homeostasis, and popularised it in his book The Wisdom of the Body, published in 1932 by W. W. Norton, New York. Cannon presented four tentative propositions to describe the general features of homeostasis: Constancy in an open system, such as our bodies represent, requires mechanisms that act to maintain this constancy. Cannon based this proposition on insights into the ways by which steady states such as glucose concentrations, body temperature, and acid-base balance were regulated.See also:

Walter Cannon, Walter Cannon - Use of salts of heavy metals in X-Rays, Walter Cannon - Fight or Flight, Walter Cannon - Homeostasis, Walter Cannon - Dry Mouth, Walter Cannon - American Physiological Society

Read more here: » Walter Cannon: Encyclopedia II - Walter Cannon - Homeostasis

The body contains 21-28 grams of magnesium (1 mmol=2mEq=24.6 mg). Of this, 53% is located in bone, 19% in non-muscular tissue, and 1% in extracellular fluid. For this reason, blood levels of magnesium are not an adequate means of establishing the total amount of available magnesium. Most of the serum magnesium is bound to chelators, (i.e. ATP, ADP, proteins and citrate). Roughly 33% is bound to proteins, and 5-10% is not bound. This "free" magnesium is essential in regulating intracellular magnesium. Normal plasma Mg is 1.7-2.3 mg/dl (0.69-0.94 mmol/l). Of this 60% is free, 33% is bound to proteins, and less than 7% i ...

See also:

Hypomagnesemia, Hypomagnesemia - Homeostasis, Hypomagnesemia - Metabolism, Hypomagnesemia - Causes, Hypomagnesemia - Treatment, Hypomagnesemia - Arrhythmia, Hypomagnesemia - Obstetric, Hypomagnesemia - Electrolyte disturbances, Hypomagnesemia - Pulmonary

Read more here: » Hypomagnesemia: Encyclopedia II - Hypomagnesemia - Homeostasis

Biology is the study, or science, of life. It is concerned with the characteristics and behaviors of organisms, how species and individuals come into existence, and the interactions they have with each other and with the environment. Biology encompasses a broad spectrum of academic fields that are often viewed as independent disciplines. However, together they address phenomena related to living organisms (biological phenomena) over a wide range of scales. Biology - Biological Phenomena. At the organism lev ...

Including:

• Biology - Biological Phenomena
• Biology - Branches of Biology
• Biology - Principles of biology
• Biology - Universality: Biochemistry cells and the genetic code
• Biology - Evolution: The central principle of biology
• Biology - Diversity: The variety of living organisms
• Biology - Continuity: The common descent of life
• Biology - Homeostasis: Adapting to change
• Biology - Interactions: Groups and environments
• Biology - Scope of biology
• Biology - Structure of life
• Biology - Physiology of organisms
• Biology - Diversity and evolution of organisms
• Biology - Interactions of organisms
• Biology - History of the word biology
• Biology - History
• Biology - Related topics

Read more here: » Biology: Encyclopedia - Biology

Walter Bradford Cannon (1871-1945) was an American physiologist. Walter Cannon - Use of salts of heavy metals in X-Rays. He was one of the first researchers to mix salts of heavy metals (including bismuth subnitrate, bismuth oxychloride, and barium sulfate) into foodstuffs in order to improve the contrast of X-ray images of the digestive tract. The barium meal is a modern derivative of this research. Walter Cannon - Fight or Flight. In 1929, he coined the term fight or ...

Including:

• Walter Cannon - Use of salts of heavy metals in X-Rays
• Walter Cannon - Fight or Flight
• Walter Cannon - Homeostasis
• Walter Cannon - Dry Mouth
• Walter Cannon - American Physiological Society

Read more here: » Walter Cannon: Encyclopedia - Walter Cannon

The kidneys are bean-shaped excretory organs in vertebrates. Part of the urinary system, the kidneys filter wastes (especially urea) from the blood and excrete them, along with water, as urine. The medical field that studies the kidneys and diseases affecting the kidney is called nephrology, from the Greek name for the kidney; the adjective meaning "kidney-related" is renal, from the Latin. Kidney - Location. In humans, the kidneys are located in the posterior part of the abdomen. There is one on eac ...

Including:

• Kidney - Location
• Kidney - Structure
• Kidney - Organization
• Kidney - Nephron
• Kidney - Collecting duct system
• Kidney - Functions
• Kidney - Excretion of waste products
• Kidney - Homeostasis
• Kidney - Hormone secretion
• Kidney - Terms
• Kidney - Diseases and disorders
• Kidney - Congenital
• Kidney - Acquired
• Kidney - Dialysis and kidney transplants
• Kidney - Medical terminology

Read more here: » Kidney: Encyclopedia - Kidney

In biology, apoptosis (from the Greek words apo = from and ptosis = falling, commonly pronounced ap-a-tow'-sis[1]) is one of the main types of programmed cell death (PCD). As such, it is a process of deliberate life relinquishment by an unwanted cell in a multicellular organism. In contrast to necrosis, which is a form of cell death that results from acute cellular injury, apoptosis is carried out in an ordered process that generally confers advantages during an organism's life cycle. For ...

Including:

• Apoptosis - Functions of apoptosis
• Apoptosis - Cell damage or infection
• Apoptosis - Response to stress or DNA damage
• Apoptosis - Homeostasis
• Apoptosis - Development
• Apoptosis - Immune cell regulation
• Apoptosis - Apoptotic process
• Apoptosis - Morphology
• Apoptosis - Biochemical signals for safe disposal
• Apoptosis - Intrinsic and extrinsic inducers
• Apoptosis - Biochemical execution
• Apoptosis - Implication and role of apoptosis in diverse pathologies
• Apoptosis - Apoptosis and HIV progression
• Apoptosis - Apoptosis and the role of interferon in tumor suppression
• Apoptosis - Cancer and defective apoptotic pathways
• Apoptosis - Role of apoptotic products in tumor immunity
• Apoptosis - Laboratory assays for apoptosis
• Apoptosis - History and highlights in apoptosis research
• Apoptosis - Early research and the worm people at Cambridge
• Apoptosis - Coining of the term apoptosis
• Apoptosis - 1988
• Apoptosis - 1990s and later
• Apoptosis - Etymology

Read more here: » Apoptosis: Encyclopedia - Apoptosis

For meanings of the word balance, see: Sense of balance (equilibrium), which maintains physical balance in humans and animals Balance (public media coverage of politics) Weighing scale Balance beam, gymnastics apparatus Biological balance (Homeostasis) within a human or other animal's body Balance (metaphysics), a desirable point between opposite forces BALANCE Act {H.R. 1066}, Benefit Authors without Limiting Advancement or Net Consumer Expectations Balance ( ...

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Inner peace (or peace of mind) is a colloquialism that refers to a state of being mentally or spiritually at peace, with enough knowledge and understanding to keep oneself strong in the face of discord or stress. Being "at peace" is considered by many to be healthy (homeostasis) and the opposite of being stressed or anxious. Peace of mind is generally associated with bliss and happiness. Many spiritual or religious people believe that it is only truly possible to achieve inner peace ...

Including:

• Inner peace - Quotes

Read more here: » Inner peace: Encyclopedia - Inner peace

Defined negatively, health is the absence of illness, functionally, as the ability to cope with everyday activities, or positively, as fitness and well-being. In any organism, health is a form of homeostasis. This is a state of balance, with inputs and outputs of energy and matter in equilibrium (allowing for growth). Health also implies good prospects for continued survival. In sentient creatures such as humans, health is a broader concept. Many definitions of health have been offered from time to time. Webster's Dic ...

Including:

• Health - Notes and references

Read more here: » Health: Encyclopedia - Health

Urine is liquid waste excreted by the kidneys and is produced by the process of filtration. This waste is eventually expelled from the body in a process known as urination. Most commonly the excretion of urine serves for flushing waste molecules collected from the blood by the kidneys, and for the homeostasis of the body liquids; however, many species also use it for olfactory communication. Urine and urination have many slang names, including "wee". Urine - Composition. Urine is a transparent soluti ...

Including:

• Urine - Composition
• Urine - Function
• Urine - Other uses
• Urine - History

Read more here: » Urine: Encyclopedia - Urine

To differentiate between western or eastern concepts of organs the first letter is capitalized (Liver, instead of liver, Spleen instead of spleen). Because Traditional Chinese Medicine (TCM) is holistic, each organ cannot be explained fully unless the TCM relationship/homeostasis with the other organs is understood. TCM also looks at the functions of the organs rather than fixed areas and, therefore, describes different organs that are not actually physical, like the Triple Burner (San Jiao). This also leads to controversy about the validity ...

Including:

• Zang Fu theory - External link

Read more here: » Zang Fu theory: Encyclopedia - Zang Fu theory

Warm-blooded is an archaic term used to describe an animal that keeps its core body temperature at a nearly constant level regardless of the temperature of the surrounding environment (that is, to maintain thermal homeostasis). This can involve not only the ability to generate heat, but also the ability to cool down. Warm-blooded animals control their body temperature by regulating their metabolic rates (e.g. increasing their metabolic rate ...

Including:

• Warm-blooded - Breaking down Warm Bloodedness
• Warm-blooded - Mechanisms
• Warm-blooded - Warm-blooded versus cold-blooded
• Warm-blooded - Between cold and warm blooded

Read more here: » Warm-blooded: Encyclopedia - Warm-blooded

Risk is the potential harm that may arise from some present process or from some future event. In everyday usage, "risk" is often used synonymously with "probability", but in professional risk assessments, risk combines the probability of a negative event occurring with how harmful that event would be. Thus in many engineering applications (see 2.1 below) Risk = probability of an accident/'event' (eg events per year) times its consequence (eg lost money, ... or deaths, per event). Risk - Formal ...

Including:

• Risk - Formal Definitions
• Risk - Background
• Risk - Risk in business
• Risk - Risk-sensitive industries
• Risk - Risk in finance
• Risk - Psychology of risk
• Risk - Regret
• Risk - Framing
• Risk - Fear as intuitive risk assessment?
• Risk - Two widely used antidotes for high risk

Read more here: » Risk: Encyclopedia - Risk

Carcinogenesis (meaning literally, the creation of cancer) is the process by which normal cells are transformed into cancer cells. Carcinogenesis - Introduction. Cell division (proliferation) is a physiological process that occurs in almost all tissues and under many circumstances. Normally homeostasis, the balance between proliferation and programmed cell death, usually in the form of apoptosis, is maintained by tightly regulating both processes to ensure the integrity of organs and tissues. Mutatio ...

Including:

• Carcinogenesis - Introduction
• Carcinogenesis - Properties of malignant cells
• Carcinogenesis - Mechanisms of carcinogenesis
• Carcinogenesis - Proto-oncogenes
• Carcinogenesis - Tumor suppressor genes
• Carcinogenesis - Multiple mutations
• Carcinogenesis - Role of genetic damage
• Carcinogenesis - Non-mutagenic carcinogens
• Carcinogenesis - Role of viral infections
• Carcinogenesis - Etiology
• Carcinogenesis - Non-mainstream theories

Read more here: » Carcinogenesis: Encyclopedia - Carcinogenesis

Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when temperature surrounding is very different. This process is known as homeostasis: a dynamic state of stability between an animal's internal environment and its external environment (the study of such processes in zoology has been called ecophysiology or physiological ecology). Whereas an organism that thermoregulates is one that keeps its temperature constant and adapts to the temperature of the environment, a thermoconformer changes its body temper ...

Including:

• Thermoregulation - Temperature regulation
• Thermoregulation - Types of thermoregulation
• Thermoregulation - Physiological temperature regulation in vertebrates
• Thermoregulation - Ectotherms
• Thermoregulation - Endotherms
• Thermoregulation - Behavioral temperature regulation
• Thermoregulation - Hibernation estivation and daily torpor
• Thermoregulation - Variations in the temperature of man and some other animals
• Thermoregulation - Variations from thermometer placement
• Thermoregulation - Variations associated with development
• Thermoregulation - Variations due to circadian rhythms
• Thermoregulation - Variations due to other factors
• Thermoregulation - Limits compatible with life
• Thermoregulation - Reference

Read more here: » Thermoregulation: Encyclopedia - Thermoregulation

Calcium metabolism or calcium homeostasis is the mechanism by which the body maintains adequate calcium levels. Derangements of this mechanism lead to hypercalcemia or hypocalcemia, which both can have important consequences for health. Calcium metabolism - Normal ranges. The serum level of calcium is closely regulated with a normal total calcium of 2.2-2.6 mmol/L (9-10.5 mg/dL) and a normal ionized calcium of 1.1-1.4 mmol/L (4.5-5.6 mg/dL). The amount of total calcium varies with the l ...

Including:

• Calcium metabolism - Normal ranges
• Calcium metabolism - Corrected calcium level
• Calcium metabolism - Effector organs
• Calcium metabolism - Sources
• Calcium metabolism - Excretion
• Calcium metabolism - The role of bone
• Calcium metabolism - Regulatory organs
• Calcium metabolism - Calcium problems

Read more here: » Calcium metabolism: Encyclopedia - Calcium metabolism

In 1981 John Adams published a paper, The efficacy of seatbelt legislation: A comparative study of road accident fatality statistics from 18 countries, Dept of Geography University College, London 1981 - published in 1982 by the Society of Automotive Engineers [1]. This showed that in the countries studied, which included states with and without seat belt laws, there was no correlation between the passing of seat belt legis ...

See also:

Risk compensation, Risk compensation - Seat Belts, Risk compensation - Antilock Brakes, Risk compensation - Cycle Helmets, Risk compensation - Risk Homeostasis

Read more here: » Risk compensation: Encyclopedia II - Risk compensation - Seat Belts