Question

The process by which food is propelled through the digestive tract by alternating contraction and relaxation of smooth muscle is:

Answer 1

It is called PERISTALSIS. Peristalsis is the involuntary constriction and relaxation of the muscles of the alimentary canal which results in the downward movement of the food particles inside the canal. The process of peristalsis starts right from the esophagus when a food is swallowed.