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 a key digestive function of bile salts?

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

The answer and the reasoning

B. Emulsify dietary lipids to aid absorption

Bile salts emulsify dietary fats and form micelles that facilitate absorption of lipids and fat-soluble vitamins; they do not enzymatically digest proteins or carbohydrates.

Option by option

  • A. Produce gastric intrinsic factor

    Intrinsic factor is produced by gastric parietal cells.

  • B. Emulsify dietary lipids to aid absorption (correct)

    Correct: bile salts aid lipid emulsification and micelle formation.

  • C. Hydrolyze starch in the mouth

    Salivary amylase begins starch digestion in the mouth.

  • D. Digest proteins into amino acids directly

    Protein digestion depends on proteases such as pepsin and pancreatic enzymes.

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.

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Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is B, Emulsify dietary lipids to aid absorption. Bile salts emulsify dietary fats and form micelles that facilitate absorption of lipids and fat-soluble vitamins; they do not enzymatically digest proteins or carbohydrates.

Why is "Produce gastric intrinsic factor" not the answer?

Intrinsic factor is produced by gastric parietal cells.

Why is "Hydrolyze starch in the mouth" not the answer?

Salivary amylase begins starch digestion in the mouth.

Why is "Digest proteins into amino acids directly" not the answer?

Protein digestion depends on proteases such as pepsin and pancreatic enzymes.

What concept does this question test?

It tests Gastrointestinal physiology in Physiology. The correct option holds because: Correct: bile salts aid lipid emulsification and micelle formation.

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.