Motility in the Small Intestines is Controlled in Part by All

Question

Motility in the small intestines is controlled in part by all of the following except
A) VIP.
B) motilin.
C) vagus nerve.
D) myenteric reflexes.
E) gastroenteric reflexes.

Accepted Answer

VIP (vasoactive intestinal peptide) primarily functions as a neurotransmitter and vasodilator, and while it does influence intestinal secretions and blood flow, it is not a direct controller of motility in the small intestines like the other options listed. Motilin, the vagus nerve, myenteric reflexes, and gastroenteric reflexes all play direct roles in regulating intestinal motility.