Waec Model Questions Vol1 2021 Biology Question 9

Practice objective / multiple choice question 9 from the 2021 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2021 Biology Objective / Multiple Choice Medium Difficulty
Question 9 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • objective

During a sudden rise in ambient temperature, the human body initiates a negative‑feedback response to maintain core temperature around 37 °C. Identify the primary sensor, the integrative centre, and the main effector(s) involved in this thermoregulatory response.

Answer Options

A. Sensor - peripheral (muscle) thermoreceptors; Integrator - thalamus; Effectors - increased metabolic heat production and vasoconstriction
Correct Answer B. Sensor - peripheral (skin) thermoreceptors; Integrator - hypothalamic preoptic area; Effectors - sweat glands and cutaneous vasodilation
C. Sensor - hypothalamic thermoreceptors; Integrator - spinal cord; Effectors - panting and brown adipose tissue activation
D. Sensor - central (brain) thermoreceptors; Integrator - medullary respiratory center; Effectors - shivering and peripheral vasoconstriction
Correct Answer
B
Correct Option:
Sensor - peripheral (skin) thermoreceptors; Integrator - hypothalamic preoptic area; Effectors - sweat glands and cutaneous vasodilation

About This Question

This is Waec Model Questions Vol1 2021 Biology Question 9. It is a objective / multiple choice question from the 2021 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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