When the sympathetic branch is activated,
A) tears and salivation are stimulated.
B) digestion is stimulated.
C) pupils of the eyes dilate.
D) blood vessels are constricted.

Question

Quizplus · Accepted Answer

When the sympathetic branch is activated, pupils of the eyes dilate. This allows more light to enter the eye and improves vision in low light conditions. Other effects of sympathetic activation include increased heart rate, increased respiration, and decreased digestion.

When the Sympathetic Branch Is Activated