38. Animal Form and Function

Explain why most endotherms are homeothermic and most ectotherms are poikilothermic.

Which of the following is a description of a behavior that helps warm the body?

During a fever, the __________ readjusts the set point of the body to a __________ temperature.

Sweating __________.

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?

On a cold day, blood vessels in the skin __________.

By definition, an ectotherm __________.

The term endotherm refers specifically to __________.

Which statement is true regarding thermoregulation?

The wolf, his coat glowing in the early spring sunshine, sat atop a cold boulder after unsuccessfully pursuing a plump jackrabbit. He continued to pant while __________.

It is a cold day in the lecture hall. When you rest your arm on the cool laminated desktop at your seat, heat is transferred __________.

Which of the following statements is true?

What do host cells provide for viruses?a. ATPb. nucleotides and amino acidsc. ribosomesd. all of the above

Which of the following would increase the rate of heat exchange between an animal and its environment?a. feathers or furb. vasoconstrictionc. wind blowing across the body surfaced.countercurrent heat exchanger

Which of the following is not an adaptation for reducing the rate of heat loss to the environment?a. feathers or furb. increasing blood flow to surface blood vesselsc. huddling behavior of penguinsd. countercurrent heat exchange