Multiple Choice
The term endotherm refers specifically to __________.
38. Animal Form and Function
Thermoregulation
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Which of the following statements is true?
A
When your body temperature is too high, sweating helps to correct the situation because it lowers the metabolic rate by dumping toxic ions.
B
When your body temperature is too low, vasodilation in the skin helps to correct the situation because it conserves heat in the body core.
C
When your body temperature is too low, shivering helps to correct the situation because it lowers the metabolic rate and conserves blood sugar.
D
None of the listed responses is correct.
E
When your body temperature is too high, vasodilation in the skin helps to correct the situation because it redirects heat from the body core to the outside.
Verified step by step guidance1
Understand the concept of homeostasis: Homeostasis is the body's ability to maintain a stable internal environment despite changes in external conditions. Temperature regulation is a key aspect of homeostasis.
Explore the mechanisms of temperature regulation: The body uses various mechanisms to regulate temperature, including sweating, vasodilation, and shivering. Each mechanism has a specific role in maintaining temperature balance.
Analyze the role of vasodilation: Vasodilation is the widening of blood vessels, which increases blood flow to the skin. This process helps dissipate heat from the body core to the environment, effectively cooling the body when it is too hot.
Evaluate the statement about vasodilation: The statement 'When your body temperature is too high, vasodilation in the skin helps to correct the situation because it redirects heat from the body core to the outside' is true. Vasodilation facilitates heat loss by increasing blood flow to the skin surface.
Consider the other options: Sweating lowers body temperature by evaporative cooling, not by dumping toxic ions. Vasodilation does not conserve heat; it releases it. Shivering increases metabolic rate to generate heat, not lower it. Therefore, the correct statement is about vasodilation during high body temperature.
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