When a bird ruffles its feathers in response to heat stress it
A) permits convective currents to carry heat away from the body surface.
B) permits exchange of air with 100% humidity for air with lower humidity, enabling evaporative cooling to occur.
C) both of these.
D) neither of these.
Correct Answer:
Verified
Q24: Heat shock proteins
A) are also known as
Q25: Polar bears have black skin. This characteristic
Q26: Vasoconstriction helps an animal retain heat by
A)
Q27: The advantage of shivering over other forms
Q28: Small desert mammals are often osmotically stressed
Q30: The thermal neutral zone (TNZ) is
A) range
Q31: In birds, the hypothalamus does not
A) stimulate
Q32: The ambient temperature at which metabolism increases
Q33: Fever
A) is a hypothalamic response to pyrogens
Q34: Regional heterotherms are animals that are
A) ectotherms
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