Which of these pairs of actions will both cause an increase in salivation?
A) Stimulating sympathetic nerves to salivary glands, and applying norepinephrine to salivary gland cells
B) Stimulating parasympathetic nerves to salivary glands, and applying norepinephrine to salivary gland cells
C) Damaging parasympathetic nerves to salivary glands, and applying acetylcholine to salivary gland cells
D) Stimulating parasympathetic nerves to salivary glands, and applying acetylcholine to salivary gland cells
E) Damaging sympathetic nerves to salivary glands, and applying norepinephrine to salivary gland cells

Question

Quizplus · Accepted Answer

Salivation is primarily controlled by the parasympathetic nervous system, which releases acetylcholine to stimulate the salivary glands. Therefore, stimulating parasympathetic nerves to the glands or applying acetylcholine to the gland cells will both cause an increase in salivation. None of the other pairs of actions will lead to an increase in salivation.

Which of These Pairs of Actions Will Both Cause an Increase