Question:
Statement I: Gastrin stimulates secretion of gastric juice.
Statement II: Cholecystokinin (CCK) stimulates contraction of gall bladder.
Statement I: Gastrin stimulates secretion of gastric juice.
Statement II: Cholecystokinin (CCK) stimulates contraction of gall bladder.
Statement II: Cholecystokinin (CCK) stimulates contraction of gall bladder.
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Remember key gastrointestinal hormone triggers:
Gastrin $\rightarrow$ stimulates gastric juice ($HCl$ + pepsinogen).
CCK $\rightarrow$ stimulates gallbladder contraction (bile release) + pancreatic enzyme secretion.
Secretin $\rightarrow$ stimulates bicarbonate release from pancreas.
Gastrin $\rightarrow$ stimulates gastric juice ($HCl$ + pepsinogen).
CCK $\rightarrow$ stimulates gallbladder contraction (bile release) + pancreatic enzyme secretion.
Secretin $\rightarrow$ stimulates bicarbonate release from pancreas.
Updated On: Jul 22, 2026
- Statement I and II are correct
- Statement I and II are incorrect
- Statement I is correct II is incorrect
- Statement I is incorrect II is correct
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
We need to analyze the physiological functions of two major gastrointestinal hormones: gastrin and cholecystokinin (CCK).
Step 2: Key Concept and Approach:
Gastrointestinal hormones regulate digestion by acting on target secretory glands.
Gastrin is secreted by G-cells in the stomach mucosa.
Cholecystokinin (CCK) is secreted by enteroendocrine cells of the duodenum.
We must verify whether the described actions of these hormones in both statements are correct.
Step 3: Detailed Explanation:
• Gastrin function: Gastrin acts primarily on parietal cells and chief cells of the stomach mucosa.
It stimulates them to secrete hydrochloric acid ($HCl$) and pepsinogen, which are the main components of gastric juice.
Thus, Statement I is correct.
• CCK function: Cholecystokinin (CCK) is released in response to fat-rich chyme entering the duodenum.
It acts on the gallbladder to trigger its contraction, which expels bile into the duodenum for fat emulsification.
It also stimulates the pancreas to secrete digestive enzymes.
Thus, Statement II is correct.
Step 4: Final Answer:
Both Statement I and Statement II are biologically correct.
We need to analyze the physiological functions of two major gastrointestinal hormones: gastrin and cholecystokinin (CCK).
Step 2: Key Concept and Approach:
Gastrointestinal hormones regulate digestion by acting on target secretory glands.
Gastrin is secreted by G-cells in the stomach mucosa.
Cholecystokinin (CCK) is secreted by enteroendocrine cells of the duodenum.
We must verify whether the described actions of these hormones in both statements are correct.
Step 3: Detailed Explanation:
• Gastrin function: Gastrin acts primarily on parietal cells and chief cells of the stomach mucosa.
It stimulates them to secrete hydrochloric acid ($HCl$) and pepsinogen, which are the main components of gastric juice.
Thus, Statement I is correct.
• CCK function: Cholecystokinin (CCK) is released in response to fat-rich chyme entering the duodenum.
It acts on the gallbladder to trigger its contraction, which expels bile into the duodenum for fat emulsification.
It also stimulates the pancreas to secrete digestive enzymes.
Thus, Statement II is correct.
Step 4: Final Answer:
Both Statement I and Statement II are biologically correct.
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