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Chapter 7 Quiz
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Chapter 7 Quiz
Quiz Content
*
not completed
.
Which of the following forms of energy can be used to do mechanical work in a machine but
cannot
be used to do physiological work in an animal?
Chemical-bond energy
correct
incorrect
Electrical energy
correct
incorrect
Mechanical energy
correct
incorrect
Heat
correct
incorrect
*
not completed
.
While riding a stationary bicycle, the maximum efficiency of converting chemical bond energy to external work is about
5%.
correct
incorrect
10%.
correct
incorrect
30%.
correct
incorrect
75%.
correct
incorrect
*
not completed
.
Animals use absorbed chemical energy for
exported chemical energy, fecal energy, heat, and mechanical energy of external work.
correct
incorrect
exported chemical energy and mechanical energy of external work only.
correct
incorrect
heat and mechanical energy of external work only.
correct
incorrect
exported chemical energy, heat, and mechanical energy of external work.
correct
incorrect
*
not completed
.
Consider a lactating animal that eats three times as much food as one that is not lactating. The lactating animal does not grow, deposit fat, or markedly increase her metabolic rate. The extra ingested energy was
saved, by reduced physical activity.
correct
incorrect
exported, in the form of milk.
correct
incorrect
lost by the animal's increased surface area.
correct
incorrect
turned to catabolized lipids for energy.
correct
incorrect
*
not completed
.
Imagine your physiology class has 100 students. It is winter and the heat has failed in the classroom, but you are not worried because 100 sitting students produce heat at the rate of about
10 W.
correct
incorrect
1000 W.
correct
incorrect
10 kW.
correct
incorrect
100 kW.
correct
incorrect
*
not completed
.
During vigorous exercise at high altitude, which substrate would be best for an animal to use if it needed to get the most energy production per unit of O
2
?
Carbohydrate
correct
incorrect
Lipid
correct
incorrect
Protein
e. Carbohydrate and lipid are equal and both are better than protein.
correct
incorrect
*
not completed
.
The respiratory exchange ratio is
CO
2
production/O
2
consumption per unit of time, measured at the gas exchange organ.
correct
incorrect
O
2
consumption/CO
2
production per unit of time, measured at the gas exchange organ.
correct
incorrect
CO
2
production/O
2
consumption per unit of time, measured at the level of the cells.
correct
incorrect
O
2
consumption/CO
2
production per unit of time, measured at the level of the cells.
correct
incorrect
*
not completed
.
With respect to the energy yield from the combustion of a carbohydrate in a bomb calorimeter and the oxidation of the same quantity of carbohydrate in an animal,
less energy would be measured in the calorimeter.
correct
incorrect
more energy would be measured in the calorimeter.
correct
incorrect
biochemical inefficiencies in an animal would lead to more heat production and less work.
correct
incorrect
the amount of energy measured would be equal in both cases.
correct
incorrect
*
not completed
.
_______ is the most common measure of metabolic rate.
Rate of CO
2
production
correct
incorrect
Rate of O
2
consumption
correct
incorrect
Rate of heat production
correct
incorrect
Ingested energy minus fecal energy
correct
incorrect
*
not completed
.
SDA tends to be _______ for meals high in _______.
lower; lipids
correct
incorrect
lower; protein
correct
incorrect
higher; lipids
correct
incorrect
higher; protein
correct
incorrect
*
not completed
.
Suppose you feed a snake a large meal and then monitor the increase in its metabolic rate after eating until the rate returns back to the fasting value. How would you quantify the magnitude of the SDA?
Measure the metabolic rate exactly 1 hour after the meal
correct
incorrect
Measure the highest metabolic rate before the metabolic rate returns to the fasting level
correct
incorrect
Measure fasting CO
2
production and add O
2
consumption after eating
correct
incorrect
Measure the cumulative increase in metabolic rate above the fasting level
correct
incorrect
*
not completed
.
Carbohydrates can be fully oxidized by animals but proteins cannot. Consequently, some of the energy from _______ must always be _______.
proteins; exported as chemical energy
correct
incorrect
carbohydrates; exported as chemical energy
correct
incorrect
proteins; used for external work
correct
incorrect
carbohydrates; used for external work
correct
incorrect
*
not completed
.
In homeotherms the resting metabolic rate of a fasting animal is the _______ and in poikilotherms the equivalent term is the _______.
standard metabolic rate; basal metabolic rate
correct
incorrect
basal metabolic rate; standard metabolic rate
correct
incorrect
specific dynamic action; calorigenic effect of feeding
correct
incorrect
routine metabolic rate; standard metabolic rate
correct
incorrect
*
not completed
.
Suppose you are trying to heat a barn using the heat from your livestock. The most total heat would be produced by _______ animal(s) that weigh _______.
1000; 1 kg each
correct
incorrect
100; 10 kg each
correct
incorrect
10; 100 kg each
correct
incorrect
2; 504 kg each
correct
incorrect
*
not completed
.
Small mammals need more O
2
per gram of body weight than large mammals do. Compared to large mammals, small mammals have_______ mass-specific lung size and breathe _______ times per minute.
larger; more
correct
incorrect
similar; more
correct
incorrect
smaller; more
correct
incorrect
larger; fewer
correct
incorrect
*
not completed
.
Compared to small mammals, large mammals tend to
produce more heat per unit of body weight.
correct
incorrect
have a larger surface area per unit of body weight.
correct
incorrect
lose heat less rapidly per unit of body weight.
correct
incorrect
have a smaller volume per unit body weight
correct
incorrect
*
not completed
.
One of the first anatomically accurate descriptions of the human circulatory system came from
Galileo.
correct
incorrect
Rembrandt.
correct
incorrect
Vesalius.
correct
incorrect
Rubner.
correct
incorrect
*
not completed
.
While the exponent for the metabolic rate to body weight relationship was originally the source of some controversy, there is now
strong agreement that the universal scaling exponent is two-thirds.
correct
incorrect
strong agreement that the universal scaling exponent is three-quarters.
correct
incorrect
general recognition that no single scaling exponent applies across all animals.
correct
incorrect
general recognition that the exponent depends on lung volume.
correct
incorrect
*
not completed
.
The common currency of life is
heat.
correct
incorrect
carbon dioxide.
correct
incorrect
energy.
correct
incorrect
oxygen.
correct
incorrect
*
not completed
.
Suppose you eat five tangerines for lunch. On average, the energy from _______ would end up being used by your brain.
one
correct
incorrect
two
correct
incorrect
three
correct
incorrect
four
correct
incorrect
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