Thermoregulation: 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 · Thermoregulation

Sample item

Which response is expected when core body temperature rises above its hypothalamic set point?

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

The answer and the reasoning

D. Cutaneous vasodilation and sweating

When core temperature rises, hypothalamic pathways promote skin vasodilation and sweating to increase heat loss through radiation, convection, and evaporation; shivering is a cold-defense response.

Option by option

  • A. Reduced evaporative heat loss

    Reducing evaporation would worsen overheating.

  • B. Increased thyroid hormone release immediately

    Thyroid changes are not the immediate cooling mechanism.

  • C. Cutaneous vasoconstriction and shivering

    Vasoconstriction and shivering conserve and generate heat during cold exposure.

  • D. Cutaneous vasodilation and sweating (correct)

    Correct: vasodilation and sweating dissipate excess body heat.

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 D, Cutaneous vasodilation and sweating. When core temperature rises, hypothalamic pathways promote skin vasodilation and sweating to increase heat loss through radiation, convection, and evaporation; shivering is a cold-defense response.

Why is "Reduced evaporative heat loss" not the answer?

Reducing evaporation would worsen overheating.

Why is "Increased thyroid hormone release immediately" not the answer?

Thyroid changes are not the immediate cooling mechanism.

Why is "Cutaneous vasoconstriction and shivering" not the answer?

Vasoconstriction and shivering conserve and generate heat during cold exposure.

What concept does this question test?

It tests Thermoregulation in Physiology. The correct option holds because: Correct: vasodilation and sweating dissipate excess body heat.

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 Thermoregulation?

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.