Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which of the following processes could be responsible for its secretion?
A) receptor-mediated endocytosis
B) exocytosis
C) diffusion
D) phagocytosis

Question

Quizplus · Accepted Answer

Exocytosis is the process by which cells release substances outside of the cell by fusing a vesicle containing the substance with the cell membrane. In the case of the cells lining the stomach, they would synthesize the digestive enzyme and package it into a vesicle that would then fuse with the cell membrane and release the enzyme into the stomach. Receptor-mediated endocytosis, diffusion, and phagocytosis do not involve the secretion of substances out of the cell.

Certain Cells That Line the Stomach Synthesize a Digestive Enzyme