A sleepy driver rounds a bend and sees a deer standing in the road. The driver snaps to attention and applies the brakes, averting the accident, because his brain was aroused by the
A)parasympathetic nervous system.
B)reticular activating system (RAS).
C)thalamus.
D)pineal gland.

Question

Quizplus · Accepted Answer

The reticular activating system (RAS) is responsible for regulating arousal and sleep-wake transitions. When the driver sees the deer, the RAS is activated, increasing alertness and attention, enabling the driver to respond quickly by applying the brakes.

A Sleepy Driver Rounds a Bend and Sees a Deer