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.


C

Anatomy & Physiology

You might also like to view...

Predict the effect of a 101°F fever on reaction rate

What will be an ideal response?

Anatomy & Physiology

Substrate-level phosphorylation takes place in the ribosomes of cells, whereas oxidative phosphorylation takes place in mitochondria.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

Which of the following is not a property of reflexes?

A. Reflexes do not require a stimulus. B. Reflexes are quick responses of the nervous system. C. Reflex responses are very predictable. D. Reflexes are responses to sensory inputs. E. Reflexes are not voluntary.

Anatomy & Physiology

The energy-dependent step in Na+ reabsorption involves the ____________________ located at the ____________________ membrane of the tubular cell

Fill in the blank(s) with correct word

Anatomy & Physiology