Question

Statement I: Gastrin stimulates secretion of gastric juice.
Statement II: Cholecystokinin (CCK) stimulates contraction of gall bladder.

• A. Statement I and II are correct
• B. Statement I and II are incorrect
• C. Statement I is correct II is incorrect
• D. Statement I is incorrect II is correct

Hint:

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.

Answer 1

The Correct Option is A

Step 1: Recall where each hormone comes from.
Gastrin is released by G-cells in the stomach lining, while cholecystokinin is released by cells in the duodenum once fatty or protein rich food arrives there.
Step 2: Check statement I.
Gastrin's main job is to trigger parietal and chief cells in the stomach to release hydrochloric acid and pepsinogen, in other words it stimulates gastric juice secretion, so this statement is correct.
Step 3: Check statement II.
Cholecystokinin makes the gall bladder contract and release bile into the duodenum while also relaxing the sphincter of Oddi, so this statement is correct too.
Final answer: Option 1, both statements are correct.