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Chapter 10 Quiz
Return to Animal Physiology 4e Student Resources
Chapter 10 Quiz
Quiz Content
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not completed
.
All animals produce heat but only some are endothermic. This is because
only endotherms produce heat fast enough or retain it well enough to elevate tissue temperatures.
correct
incorrect
ectotherms are too small to be endothermic.
correct
incorrect
ectotherms cannot thermoregulate.
correct
incorrect
thermoregulation requires endothermy.
correct
incorrect
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If a 3800-kg elephant and a 20-g mouse both have body temperatures of 37°C, which statement would be true?
The temperatures of the animals and the amount of heat they contain are similar but different.
correct
incorrect
Both animals have the same temperature and contain the same amount of heat.
correct
incorrect
Both animals have the same temperature but contain different amounts of heat.
correct
incorrect
Both animals have the same temperature but the average molecular speed inside the mouse is faster.
correct
incorrect
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What is the key distinction between conduction and convection?
In conduction, the atoms of the substance participate in transfer of heat, but in convection they do not.
correct
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In convection, the atoms of the substance participate in transfer of heat, but in conduction they do not.
correct
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Convection involves heat transfer through macroscopic motion.
correct
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Conduction involves heat transfer through macroscopic motion.
correct
incorrect
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H
radiative emission
= ε σ T
surface
4
is known as
the heat balance equation.
correct
incorrect
Bergmann's rule.
correct
incorrect
the second law of thermodynamics.
correct
incorrect
the Stefan-Boltzmann equation.
correct
incorrect
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The effects of animal coloration on heat balance are
greater at night.
correct
incorrect
greater in sunlight.
correct
incorrect
unaffected by sunlight.
correct
incorrect
primarily via convection.
correct
incorrect
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Compared to light-colored animals, dark-colored animals absorb _______ short wavelength radiation and _______ longer wavelength radiation.
more; less
correct
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less; more
correct
incorrect
about the same amount of; more
correct
incorrect
more; about the same amount of
correct
incorrect
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An animal that can function effectively over a wide range of temperatures and cannot elevate its tissue temperature above the environmental temperature is a
stenothermal poikilotherm.
correct
incorrect
stenothermal endotherm.
correct
incorrect
eurythermal endotherm.
correct
incorrect
eurythermal poikilotherm.
correct
incorrect
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As environmental temperature increases, a poikilotherm's metabolic rate
stays the same if it is within its thermoneutral zone.
correct
incorrect
increases linearly.
correct
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increases exponentially.
correct
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can either increase or decrease, depending on the species.
correct
incorrect
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If metabolic rate (
M
) were a true exponential function of the body temperature (
T
B
) of an ectotherm, which equation would describe that relationship? (Assume that
a
and
n
are constants for each data set.)
M
= a
·
10
n
·
T
B
correct
incorrect
T
B
=
aM
n
correct
incorrect
M
=
aT
B
10·
n
correct
incorrect
T
B
=
aM
10·
n
correct
incorrect
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Some Antarctic molluscs die of heat stress if their body temperature rises above 2°C and some tropical molluscs die of cold stress if cooled to 4°C. This comparison illustrates
the phenomenon of acclimation.
correct
incorrect
the phenomenon of acclimatization.
correct
incorrect
the phenomenon of evolutionary specialization.
correct
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that the pejus temperature for molluscs is about 3°C.
correct
incorrect
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Why do the eyes of cows and soldierfish get cold cataracts at low temperatures, while the lenses of the Antarctic toothfish stay clear?
Toothfish are acclimatized to cold; cows and soldierfish are not.
correct
incorrect
The chemical structure of the crystalline proteins of the toothfish differ from that of the cow and the soldierfish.
correct
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Toothfish have tissues that serve as heaters to keep their eyes warm in cold water; the cow and the soldierfish do not.
correct
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Toothfish are eurythermal; the cow and soldierfish are stenothermal.
correct
incorrect
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If the temperature of the oceans increased by 4°C, which organism would likely be most affected?
Pagothenia (an Antarctic genus of fish)
correct
incorrect
The mullet (a warm water fish)
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Temperate water gobies
correct
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A very eurythermal fish
correct
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Animals from numerous habitats tend to have relatively similar membrane fluidities when they are living at their respective, normal body temperatures. The relative constancy of membrane fluidity regardless of tissue temperature is called
lipid stabilization.
correct
incorrect
saturation dynamics.
correct
incorrect
bilayer constancy.
correct
incorrect
homeoviscous adaptation.
correct
incorrect
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Homeothermy is
the regulation of body temperature by physiological means.
correct
incorrect
the regulation of body temperature through behavior.
correct
incorrect
the regulation of metabolic rate within the thermal neutral zone.
correct
incorrect
equal to basal metabolic rate plus external work.
correct
incorrect
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As a mammal experiences an increase in ambient temperature from the lower critical temperature to the upper critical temperature, its body temperature _______, metabolic rate _______, and thermal conductance _______.
increases; increases; increases
correct
incorrect
increases; is relatively constant; decreases
correct
incorrect
is relatively constant; is relatively constant; decreases
correct
incorrect
is relatively constant; is relatively constant; increases
correct
incorrect
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Which mechanism is used by mammals, but not birds, to ameliorate heat stress at temperatures above thermoneutrality?
Shivering
correct
incorrect
Sweating
correct
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Gular fluttering
correct
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Panting
correct
incorrect
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In the studies of Hill et al., the ear temperatures of resting jackrabbits were at about 8°C when air temperature was 8°C. Immediately after running, the rabbits registered ear temperatures higher than 30°C, but in less than 30 minutes the temperatures had returned to about 8°C. What is the likely reason for the increase in ear temperature during running?
An increase in radiative heat gain by the ears
correct
incorrect
An increase in convective heat gain by the ears
correct
incorrect
Dissipation of excess metabolic heat produced during running
correct
incorrect
Retention of body heat during exercise
correct
incorrect
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During a bout of fever in a placental mammal, _______ of cutaneous vascular beds are activated when the set point of the thermoregulatory control system is above body temperature. When the set point of the thermoregulatory control system is below body temperature, _______ of cutaneous vascular beds are activated.
sweating and vasodilation; shivering and vasoconstriction
correct
incorrect
sweating and vasoconstriction; shivering and vasodilation
correct
incorrect
shivering and vasodilation; sweating and vasoconstriction
correct
incorrect
shivering and vasoconstriction; sweating and vasodilation
correct
incorrect
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In a limb, a countercurrent flow arrangement of arteries and veins short-circuits the flow of _______ down its length.
heat
correct
incorrect
oxygen
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nutrients
correct
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waste products
correct
incorrect
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Antelope ground squirrels are diurnally active rodents that live in hot deserts. In summer, they alternate between trips above-ground and trips down to their cooler burrows. When they are above-ground their body temperature temporarily rises (transient hyperthermia). This most likely
conserves energy.
correct
incorrect
conserves water.
correct
incorrect
occurs because they are not capable of thermoregulation.
correct
incorrect
allows them to bring heat back down into the burrows to warm their young.
correct
incorrect
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Countercurrent heat exchange is important in the _______ of a warm-bodied fish.
backbone
correct
incorrect
gills
correct
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red swimming muscles
correct
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white swimming muscles
correct
incorrect
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