Question

1 — anatomy of digestive tract
learning objective: define the process of food digestion including the actions of organs, muscles, and enzymes
which of the following is a muscular contraction that helps push the bolus down the digestive tract?
a.) mastication
b.) peristalsis
c.) bile
d.) chyme

Explanation:

• Option a: Mastication is chewing, not for pushing bolus down the tract.
• Option b: Peristalsis is the rhythmic muscular contraction that propels the bolus through the digestive tract.
• Option c: Bile is a digestive fluid, not a muscular contraction.
• Option d: Chyme is the partially digested food mixture, not a contraction.

Answer:

b.) Peristalsis