Which of the following occurs as a function of the sympathetic nervous system?
A) increased salivation to aid digestion
B) dilatation of the pupils in the eyes
C) slowed heartbeat
D) excited digestive tract

Question

Quizplus · Accepted Answer

Dilatation of the pupils (mydriasis) is a function of the sympathetic nervous system, which prepares the body for the fight or flight response by increasing alertness and visual acuity.

Answer: D
 The sympathetic nervous system inhibits digestive processes, such as digestion and absorption, and instead diverts blood flow to other organs and muscles to prepare for physical activity or stress. This is known as the fight or flight response. Therefore, an excited digestive tract is not a function of the sympathetic nervous system.

Additional information:
A) Increased salivation is a function of the parasympathetic nervous system, not the sympathetic nervous system. The parasympathetic nervous system is responsible for "rest and digest" functions, such as digestion and salivation.
C) Slowed heartbeat is also a function of the parasympathetic nervous system, which dominates during rest and relaxation. The sympathetic nervous system increases heart rate and contractility to support activity and stress.

Which of the Following Occurs as a Function of the Sympathetic