Multiple Choice
Food entering the stomach will first pass through the:
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23. The Digestive System
The Stomach
Multiple Choice
Which of the following does not stimulate the secretion of HCl in the stomach?
A
Histamine
B
Secretin
C
Acetylcholine
D
Gastrin
Verified step by step guidance1
Understand the role of hydrochloric acid (HCl) in the stomach: HCl is crucial for digestion and is secreted by parietal cells in the stomach lining.
Identify the substances that stimulate HCl secretion: Histamine, acetylcholine, and gastrin are known to stimulate the secretion of HCl.
Learn about the role of histamine: Histamine binds to H2 receptors on parietal cells, leading to increased secretion of HCl.
Understand the function of acetylcholine: Acetylcholine is a neurotransmitter that stimulates parietal cells via the vagus nerve, promoting HCl secretion.
Explore the role of secretin: Secretin is a hormone that primarily stimulates the pancreas to release bicarbonate, which neutralizes stomach acid, and does not stimulate HCl secretion in the stomach.
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