Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 10 of 99
When the surrounding environmental temperature rises above core body temperature, the human body responds by:
A
Involuntary shivering
B
Cutaneous vasoconstriction
C
Cutaneous vasodilation
D
Piloerection
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Cutaneous vasodilation
Concept: Autonomic homeostatic responses to elevated temperature.

Solution: Smooth muscles in superficial arterioles relax, causing cutaneous vasodilation. This directs warm blood to the skin surface to facilitate heat loss via radiation and convection.

Why other options are incorrect:
  • Option A: Shivering generates muscle heat during cold stress.

  • Option B: Vasoconstriction reduces surface blood flow to conserve heat in cold conditions.

  • Option D: Piloerection traps an insulating layer of air during cold exposure.

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