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Multiple Choice
Which type of cells in the stomach produce pepsin, an enzyme that breaks down proteins?
A
Enteroendocrine cells
B
Chief cells
C
Goblet cells
D
Parietal cells
Verified step by step guidance
1
Understand the function of pepsin: Pepsin is an enzyme that breaks down proteins into smaller peptides. It is secreted in an inactive form called pepsinogen, which is activated in the acidic environment of the stomach.
Identify the types of cells in the stomach: The stomach contains several specialized cells, including chief cells, parietal cells, goblet cells, and enteroendocrine cells, each with distinct functions.
Focus on chief cells: Chief cells are responsible for producing and secreting pepsinogen, the inactive precursor of pepsin. Once secreted, pepsinogen is converted into active pepsin in the presence of stomach acid.
Differentiate the roles of other cells: Parietal cells produce hydrochloric acid (HCl), which creates the acidic environment needed for pepsin activation. Goblet cells secrete mucus to protect the stomach lining, and enteroendocrine cells release hormones to regulate digestion.
Conclude that chief cells are the correct answer: Since chief cells produce pepsinogen, which is the precursor to pepsin, they are the type of cells responsible for producing pepsin in the stomach.