Impulses along the vagus nerve stimulate gastric secretions in the cephalic phase of the regulation of gastric secretions.

Question

Quizplus · Accepted Answer

Impulses along the vagus nerve do stimulate gastric secretions in the cephalic phase, as part of the reflex arc that begins when sensory receptors in the mouth and/or stomach are stimulated by the sight, smell, taste, or even thought of food. These impulses travel along the vagus nerve to the medulla oblongata, which sends efferent (motor) signals back along the vagus nerve to the stomach, increasing the secretion of hydrochloric acid, pepsinogen, and other digestive enzymes. This prepares the stomach for the arrival of food and helps to optimize digestion and absorption.

Impulses Along the Vagus Nerve Stimulate Gastric Secretions in the Cephalic