When compared with ectotherms, endotherms
A) have cells that are more efficient at using energy.
B) have cells that are less leaky to ions.
C) expend less energy to maintain concentration gradients of K+ and Na+.
D) have cells that have higher metabolic rates.
E) must actively transport more K+ out of their cells when at rest.
Correct Answer:
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Q192: Which characteristic is true of a "cold"
Q193: The mechanism of heat transfer that occurs
Q194: You feel cooler when standing directly in
Q195: Heat is transferred from an animal's core
Q196: Which correctly represents an energy budget?
A) Metabolism
Q198: The metabolic rates of endotherms
A) increase within
Q199: Which statement is correct?
A) Many insects produce
Q200: In the countercurrent heat exchanger of a
Q201: Shivering
A) occurs in birds and mammals.
B) relies
Q202: Refer to the graph. 
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