Which hormones are involved in regulating gastric motility by making the threshold potential of muscle fibers more negative? (Select all that apply.)
A) Estrogen
B) Secretin
C) Somatostatin
D) Gastrin
E) Motilin

Question

Quizplus · Accepted Answer

Gastrin and motilin (small intestine hormones)and the vagus nerve increase contraction by making the threshold potential of muscle fibers less negative.Sympathetic activity and secretin (another small intestine hormone)are inhibitory and make threshold potential more negative.The rate of peristalsis is mediated by pacemaker cells that initiate a wave of depolarization (basic electrical rhythm),which moves from the upper part of the stomach to the pylorus.Neither estrogen nor somatostatin inhibits gastric motility as described in the question.

Which Hormones Are Involved in Regulating Gastric Motility by Making