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)endocytosis
B)exocytosis
C)diffusion
D)pinocytosis

Question

Quizplus · Accepted Answer

Exocytosis is the process of releasing substances from a cell by fusing a vesicle containing the substance with the cell membrane, which allows its content to be secreted out of the cell. This is the process by which cells that synthesize and secrete proteins can release them into the extracellular space or bloodstream. In this case, the enzyme synthesized by the stomach lining cells is a protein, so exocytosis is the most likely mechanism for its secretion into the stomach.

Certain Cells That Line the Stomach Synthesize a Digestive Enzyme