The deer waits motionlessly, hidden in the thicket as the band of hunters approach. As they get closer, their dogs bark, picking up the scent of their prey. In a futile effort to escape, the deer bolts. Which of the following most accurately describes the nervous system of the hunted deer at this point?
A) Its sympathetic nerve fibers are more active than its parasympathetic nerve fibers.
B) Its parasympathetic nerve fibers are more active than its sympathetic nerve fibers.
C) Both its sympathetic and parasympathetic nerve fibers are equally active.
D) Neither its sympathetic nor its parasympathetic nerve fibers are aroused.

Question

Quizplus · Accepted Answer

The hunted deer would experience a fight-or-flight response as it senses danger from the approaching hunters and their dogs. This is mediated by the sympathetic nervous system, which would increase heart rate, breathing rate, and blood pressure in order to prepare the body for action. The parasympathetic nervous system, which is responsible for rest and digestion, would not be very active in this situation. Therefore, choice A is the best answer.

The Deer Waits Motionlessly, Hidden in the Thicket as the Band