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In the late fall, bats hibernate in clusters with many bats pressed together and holding on to one another. Which of the following statements does not represent an advantage of this behavior?
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38. Animal Form and Function
Thermoregulation
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Which statement is true regarding thermoregulation?
A
An ectotherm such as a lizard does not maintain a fairly constant body temperature.
B
Endotherms must always maintain a fairly constant body temperature to survive.
C
In furry animals, raised hairs keep the animal cooler than lowered hairs.
D
A dilated blood vessel conserves more heat than a constricted one.
E
Ectotherms generally do not conserve body heat as effectively as do marine mammals.
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Understand the concept of thermoregulation: Thermoregulation is the process by which animals maintain their body temperature within certain boundaries, even when the surrounding temperature is different.
Differentiate between ectotherms and endotherms: Ectotherms rely on external environmental conditions to regulate their body temperature, while endotherms generate heat metabolically to maintain a constant body temperature.
Analyze the statement about ectotherms: Ectotherms, such as lizards, do not maintain a constant body temperature; instead, their body temperature fluctuates with the environment.
Consider the role of fur in thermoregulation: In furry animals, raised hairs trap more air and provide insulation, keeping the animal warmer, not cooler.
Evaluate the function of blood vessels in heat conservation: Dilated blood vessels increase blood flow to the skin, facilitating heat loss, while constricted vessels reduce blood flow to conserve heat.
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