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Chapter 11 Quiz
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Chapter 11 Quiz
Quiz Content
*
not completed
.
In the distal limb of a reindeer, the lipid composition
is mostly stearic acid.
correct
incorrect
is mostly palmitic acid.
correct
incorrect
has a very small amount of oleic acid.
correct
incorrect
has a high proportion of oleic acid.
correct
incorrect
*
not completed
.
Which statement about reindeer is
false
?
There is more unsaturated fat in the distal limb than in the proximal limb.
correct
incorrect
The microbe composition in their rumen changes in winter.
correct
incorrect
In winter, their ability to digest cellulose decreases.
correct
incorrect
Palmitic acid and stearic acid are less abundant in the distal limb.
correct
incorrect
*
not completed
.
Stearic acid is _______ and contains _______ double bond (s)
saturated; 0
correct
incorrect
monounsaturated; 1
correct
incorrect
polyunsaturated; 1
correct
incorrect
polyunsaturated; 2
correct
incorrect
*
not completed
.
Which fatty acid would you expect to find in the proximal limb of a reindeer?
Only stearic acid
correct
incorrect
Only oleic acid
correct
incorrect
Triglycerides
correct
incorrect
Some saturated fatty acids and some unsaturated fatty acids.
correct
incorrect
*
not completed
.
A newborn reindeer with a resting metabolic rate of 10 watts/kg may have a rate of metabolic heat production of _______watts/kg.
20
correct
incorrect
10
correct
incorrect
5
correct
incorrect
1
correct
incorrect
*
not completed
.
Which statement regarding microbes in the rumen of reindeer is true?
The microbes increase their activity to digest cellulose in summer as compared to winter.
correct
incorrect
In winter, microbes that digest xylan decrease in activity relative to their activity in summer.
correct
incorrect
In summer, microbes that digest proteins increase in activity relative to their activity in winter.
correct
incorrect
In summer, microbes that digest starch decrease slightly in activity relative to their activity in winter.
correct
incorrect
*
not completed
.
The gene for UCP1 is no longer expressed in newborn reindeer by _______ of age.
1 week
correct
incorrect
1 month
correct
incorrect
2 months
correct
incorrect
1 year
correct
incorrect
*
not completed
.
Which organelle is found in large quantities in brown fat cells?
Nucleus
correct
incorrect
Lysosome
correct
incorrect
Mitochondria
correct
incorrect
Golgi apparatus
correct
incorrect
*
not completed
.
Which ability is most advantageous for a large mammal, such as a reindeer, in a cold environment?
The ability to escape the cold by living under the snow
correct
incorrect
Possessing physiological modifications to thermoregulate
correct
incorrect
Finding refuge
correct
incorrect
Producing very thick pelage
correct
incorrect
*
not completed
.
Mammals that weigh _______ are generally not hibernators.
6 g
correct
incorrect
1 kg
correct
incorrect
4 kg
correct
incorrect
50 kg
correct
incorrect
*
not completed
.
Which animal would have the least energy savings per gram if it were to hibernate?
Elephant
correct
incorrect
Bear
correct
incorrect
Mouse
correct
incorrect
Squirrel
correct
incorrect
*
not completed
.
Hibernators store fat in
hepatocytes.
correct
incorrect
enterocytes.
correct
incorrect
adipocytes.
correct
incorrect
reticulocytes.
correct
incorrect
*
not completed
.
Which statement about hibernating animals storing nutrients to prepare for hibernation is true?
Some animals start storing nutrients based on photoperiodic cues.
correct
incorrect
Some animals start storing nutrients based on pheromonal signals.
correct
incorrect
Some animals start storing nutrients just before the first frost.
correct
incorrect
Some animals start storing nutrients based on behavioral signals.
correct
incorrect
*
not completed
.
The most common macromolecule stored in the adipocytes of animals prior to hibernation is
carbohydrate.
correct
incorrect
fat.
correct
incorrect
protein.
correct
incorrect
nucleic acid.
correct
incorrect
*
not completed
.
Which diet supports longer bouts of hibernation?
High starch diet
correct
incorrect
Protein-rich grain diet
correct
incorrect
Nucleic acid-rich diet
correct
incorrect
Polyunsaturated fat-rich diet
correct
incorrect
*
not completed
.
An animal with a saturated fatty acid to polyunsaturated fatty acid ratio of _______ will have the best hibernation performance.
3:1
correct
incorrect
2:1
correct
incorrect
1.5:1
correct
incorrect
1:1
correct
incorrect
*
not completed
.
Animals are fed different diets and their oxygen consumption at an ambient temperature of 2°C is measured. The animals that will have the lowest oxygen consumption are the animals that have been fed a _______ diet.
carbohydrate-rich
correct
incorrect
polyunsaturated fatty acid-rich
correct
incorrect
saturated fat-rich
correct
incorrect
protein-rich
correct
incorrect
*
not completed
.
Which is a plausible rationale for periodic arousal of animals during hibernation?
To restore synapses in the brain
correct
incorrect
To void
correct
incorrect
To exercise muscles
correct
incorrect
To increase blood circulation
correct
incorrect
*
not completed
.
If one alpine marmot consumes a diet poor in omega-6 PUFAs and another alpine marmot consumes a diet rich in omega-6 PUFAs, the animal that consumed fewer omega-6 PUFAs would
lose more weight during hibernation.
correct
incorrect
be a more effective hibernator.
correct
incorrect
have a lower body temperature.
correct
incorrect
have a superior lipid matrix for membrane protein function.
correct
incorrect
*
not completed
.
In ground squirrels, the size of testes _______ during hibernation.
increases
correct
incorrect
decreases
correct
incorrect
stays the same
correct
incorrect
increases first and then decreases
correct
incorrect
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