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metabolic rate

A measure of the energy used by an animal in a given time period. The metabolic rate of an animal is affected by several interacting factors, including temperature and the level of ...

metabolic rate

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A Dictionary of Food and Nutrition (4 ed.)

Reference type:
Subject Reference
Current Version:
2014

... rate Rate of utilization of energy . See basal metabolic rate...

metabolic rate

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A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
45 words

... rate The rate at which energy is used as an organism carries out its metabolism . The metabolic rate is usually measured by the oxygen consumption of the organism, and calibrated using either the basal metabolic rate or a standard metabolic rate...

metabolic rate

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A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
51 words

...metabolic rate A measure of the energy used by an animal in a given time period. The metabolic rate of an animal is affected by several interacting factors, including temperature and the level of activity. The metabolic rate of a resting animal is known as the basal metabolic rate ...

metabolic rate

metabolic rate   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
41 words

... rate the rate of metabolism of an animal measured under given conditions. It may be determined from the dioxygen consumption and carbon dioxide (and urinary nitrogen) excretion, or from the total energy output of the animal. Compare basal metabolic rate...

metabolic rate

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The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

... rate The energy expended by a person, usually expressed in units of energy per unit body mass, per unit...

metabolic rate

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A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... rate The rate at which the chemical reactions constituting the metabolism of a living organism take place. This varies according to the species of the organism, its gender, age, and level of physical activity. Metabolic rate is usually expressed as energy per unit surface area per unit time (e.g. kJ/m 2...

metabolic rate

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A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... rate The rate of biochemical reactions within an organism , which can be estimated by measuring food consumption, energy released as heat, or oxygen used in metabolic activity . It is usually expressed as energy per unit surface area per unit time, e.g. kilojoules per square metre per hour (kJ m −2 h −1...

standard metabolic rate

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A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
40 words

...metabolic rate ( SMR ) The minimum metabolic rate needed to sustain life at a specified temperature. The SMR is measured in organisms that are resting in a post-absorptive state and in darkened conditions. Compare basal metabolic rate...

resting metabolic rate

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The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

...metabolic rate The metabolic rate of a person at rest. When the resting metabolic rate is measured early in the morning in a laboratory under optimal conditions of quiet and relaxation, following an overnight fast and 8 hr sleep, it is regarded as an approximation of basal metabolic rate...

basal metabolic rate

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A Dictionary of Biomedicine (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...basal metabolic rate The BMR is the amount of energy being expended when in a state of complete rest, but not asleep, and not involved in digestion. A simpler measurement is the resting metabolic rate...

basal metabolic rate

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A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
42 words

...metabolic rate ( BMR ) The minimum metabolic rate needed to sustain the life of an organism that is in an environment at a temperature equal to its own. The BMR is measured in organisms in a post-absorbtive, resting...

basal metabolic rate

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World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
63 words

...metabolic rate ( BMR ) Amount of energy required to sustain basic life processes, including breathing and circulation. It is calculated by measuring oxygen consumption. Metabolic rate increases above BMR during physical activity or fever, or under the influence of some drugs. It falls below BMR during sleep, general anaesthesia or starvation. BMR is highest in children and decreases with age. See also ...

basal metabolic rate

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A Dictionary of Public Health (2 ed.)

Reference type:
Subject Reference
Current Version:
2018

...basal metabolic rate The minimum energy required by the body to sustain metabolism, measured by oxygen consumption and expressed in kilojoules per square meter of body surface. ...

basal metabolic rate

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A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

...metabolic rate n. The rate at which metabolism occurs in the body at rest, 12 to 14 hours after eating, usually measured in kilocalories of heat generated per square metre of body surface area per hour. See also Calorie . BMR ...

basal metabolic rate

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A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
152 words

...basal metabolic rate ( BMR ) The rate of energy metabolism required to maintain a nongrowing, unstressed, endothermic animal at rest. BMR is measured in terms of heat production per unit time and is usually expressed in kilojoules of heat released per square metre of body surface per hour (kJm −2 h −1 ). It indicates the energy consumed in order to sustain such vital functions as heartbeat, breathing, nervous activity, active transport, and secretion. Different tissues have different metabolic rates (e.g. the BMR of brain tissue is much greater than that of...

standard metabolic rate

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A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
74 words

...standard metabolic rate ( SMR ) The rate of energy metabolism required to maintain a non-growing, non-active, ectothermic animal. It is measured at a specified temperature, because the SMR of ectotherms varies according to the environmental temperature. The SMR of aquatic animals such as fishes and shrimps can be calculated from their oxygen consumption, e.g. by monitoring changes in the oxygen concentration of the water in a specially designed aquarium. Compare basal metabolic rate...

basal metabolic rate

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A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

...metabolic rate ( BMR ) The rate at which an animal must release energy metabolically in order to maintain itself at rest. Since the BMR of different body tissues varies, the BMR for a particular animal is determined by the composition of its tissues; for a group of animals BMR is inversely proportional to body weight (i.e. small animals usually have a higher BMR than large...

basal metabolic rate

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A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

...metabolic rate ( BMR ) The rate at which energy must be released metabolically in order to maintain an animal at rest. Since the BMR of different body tissues varies, the BMR for a particular animal is determined by the composition of its tissues; for a group of animals BMR is inversely proportional to body weight (i.e. small animals usually have a higher BMR than large...

basal metabolic rate

basal metabolic rate   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
64 words

...metabolic rate abbr. : BMR; the rate of energy metabolism of an animal at rest but not asleep. It is measured with the animal in a ‘comfortable’ ambient temperature, and in the postabsorptive state, at least 12 hours after taking food. It may be determined from the oxygen consumption and carbon dioxide (and urinary nitrogen) excretion, or from the heat production of the...

basal metabolic rate

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A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
52 words

...basal metabolic rate ( BMR ) The amount of energy the body requires to keep functioning at rest to maintain vital functions such as circulation, respiration, digestion, and the maintenance of body temperature. The BMR is influenced by age, sex, and thyroid activity and is generally higher in men than...

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