Question

where does peristalsis occur in the digestive tract?

multiple choice

in the stomach and small intestine only

from the pharynx to the anus

in the small and large intestines only

in the stomach, small intestine, and large intestine

Explanation:

Peristalsis is the involuntary contraction and relaxation of the muscles (smooth muscle) in the digestive tract. It occurs along the entire digestive tract, starting from the pharynx (throat) where the swallowing reflex initiates peristalsis to move food into the esophagus. Then it continues through the esophagus, stomach, small intestine, large intestine, and finally to the anus. It helps in the movement of food, mixing of food with digestive juices (in stomach and intestines), and also in the elimination of waste (in large intestine and anus). So it's not restricted to just the stomach, small intestine, or large intestine but occurs from the pharynx to the anus.

Answer:

From the pharynx to the anus.