Multiple Choice
What is the primary function of the villi in the small intestine?
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23. The Digestive System
Introduction to the Digestive System
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Gastrin has which of the following effects on gastrointestinal (GI) motility?
A
Decreases gastric motility
B
Has no effect on gastric motility
C
Inhibits gastric motility
D
Increases gastric motility
Verified step by step guidance1
Understand the role of gastrin: Gastrin is a hormone produced by the G-cells in the stomach lining. It plays a crucial role in the digestive process.
Identify the primary function of gastrin: Gastrin stimulates the secretion of gastric acid (HCl) by the parietal cells of the stomach, which is essential for digestion.
Connect gastrin to gastric motility: Gastrin not only stimulates acid secretion but also enhances gastric motility, which is the movement of the stomach muscles to mix and propel contents.
Consider the physiological response: Increased gastric motility helps in the efficient mixing of food with gastric juices, facilitating digestion.
Conclude the effect of gastrin: Based on its role in stimulating both acid secretion and muscle movement, gastrin increases gastric motility.
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