Question

Peristaltic waves are __ that move the bolus down the esophagus and into the stomach

A. Digestive enzymes
B. Oral cavity structures
C. Voluntary muscle contractions
D. Involuntary muscle contractions

Answer 1

Peristaltic waves are involuntary muscle contractions that move the bolus down the esophagus and into the stomach.

Step-by-step explanation:

Peristaltic waves are involuntary muscle contractions that move the bolus down the esophagus and into the stomach. These waves consist of sequential, alternating waves of contraction and relaxation of the smooth muscles in the walls of the alimentary canal. Peristalsis is a powerful process that propels food through the digestive system, allowing it to enter the stomach even if the person is standing on their head.