Which of the Following is a General Function of the Parasympathetic

Question

Which of the following is a general function of the parasympathetic division of the ANS?
A) dilation of the respiratory passageways
B) inhibition of sexual arousal
C) increased smooth muscle activity along the digestive tract
D) dilation of the pupils
E) increased heart rate

Accepted Answer

The parasympathetic division of the ANS is responsible for increasing smooth muscle activity along the digestive tract, which aids in digestion and absorption of nutrients.

Answer: B 
 The parasympathetic division of the ANS inhibits sexual arousal by reducing blood flow to genital organs and reducing the secretion of certain hormones.

Answer: D 
 The parasympathetic division of the ANS stimulates the constriction of the pupils (miosis), which helps to focus vision.

Answers A and E are incorrect. The parasympathetic division of the ANS does not cause dilation of the respiratory passageways or increase heart rate. These functions are controlled by the sympathetic division of the ANS.