Gastrointestinal physiology: practice question

A Physiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Physiology · Gastrointestinal physiology

Sample item

What is the main action of secretin?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Stimulate bicarbonate secretion

Secretin stimulates pancreatic and biliary bicarbonate secretion in response to acidic chyme entering the duodenum, helping neutralize the luminal acid.

Option by option

  • A. Stimulate gastric acid

    Gastrin, not secretin, stimulates gastric acid secretion.

  • B. Increase insulin resistance

    Secretin does not function by increasing insulin resistance.

  • C. Stimulate bicarbonate secretion (correct)

    Correct: secretin promotes bicarbonate-rich secretion.

  • D. Cause gallbladder contraction

    Cholecystokinin is the main hormonal stimulus for gallbladder contraction.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Physiology questions

Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is C, Stimulate bicarbonate secretion. Secretin stimulates pancreatic and biliary bicarbonate secretion in response to acidic chyme entering the duodenum, helping neutralize the luminal acid.

Why is "Stimulate gastric acid" not the answer?

Gastrin, not secretin, stimulates gastric acid secretion.

Why is "Increase insulin resistance" not the answer?

Secretin does not function by increasing insulin resistance.

Why is "Cause gallbladder contraction" not the answer?

Cholecystokinin is the main hormonal stimulus for gallbladder contraction.

What concept does this question test?

It tests Gastrointestinal physiology in Physiology. The correct option holds because: Correct: secretin promotes bicarbonate-rich secretion.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Gastrointestinal physiology?

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.