The regulation of stomach motility and secretion
A) does not vary based on the composition of the meal.
B) is affected by the food that has not yet reached the stomach.
C) is controlled in part by the hormone pepsin.
D) is not affected by the material that has exited the stomach.

Question

Quizplus · Accepted Answer

The regulation of stomach motility and secretion is affected by the food that has not yet reached the stomach. This is because signals from the mouth and GI tract, such as the sight, smell, and taste of food, as well as the presence of nutrients in the small intestine, can stimulate the release of hormones and neural signals that affect stomach motility and secretion. The composition of the meal can also affect these signals, leading to different responses in the stomach. However, pepsin is not a hormone, but rather an enzyme produced by the stomach that helps to break down proteins. Lastly, the material that has exited the stomach can affect the regulation of later stages of digestion, such as intestinal motility and absorption.

The Regulation of Stomach Motility and Secretion