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13 Cards in this Set
- Front
- Back
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What is the efficiency of cellular respiration (how much energy is lost as heat)?
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42%
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What is the rate of ATP consumption during:
-Rest? -Strenuous exercise? |
-3 mol ATP/h
-30 mol ATP/h |
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Define "Basal metabolic rate".
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Minimal rate of energy expenditure in an awake individual at neutral ambient temperature and absence of physical activity.
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What conditions must be fulfilled when measuring basal metabolic rate?
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-Measured 12-18h after last meal.
-Measured just after awakening. -At normal ambient and body temperature. -Physically and psychologiacally at rest. |
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What is the difference between basal metabolic rate (BMR) and resting energy expenditure (REE)?
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REE is not measured directly after awakening.
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How does the size of an animal relate to BMR?
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The intensity of BMR (BMR/kg) decreses with size of homeothermic animals.
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The surface area of the body is related to...?
The volume of the body is related to...? |
-Heat release.
-Heat production. |
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What is the difference between direct biocalorimetry and indirect biocalorimtrey?
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-Direct measures the actual heat released.
-Indirect measures oxygen and carbon dioxide. |
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Define respiratory quotient (RQ) verbally and mathematically.
What is the quotient in: -Carbohydrates? -Lipids? What is a normal value in humans? |
The ratio of the rate of CO2 production and O2 uptake.
RQ=V(CO2)/V(O2) -1 -0.7 0.8 |
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What is most relevant for a constant body temperature?
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The release of heat
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Why do we have to maintain a constant body temperature?
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To control the rate of chemical reactions.
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How does the body transfer heat into its surroundings?
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-Evaporation
-Radiation -Conduction -Convection |
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The efficiency of evaporative cooling depends on...?
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Environmental humidity
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