Igcse Model Questions Vol1 2022 Biology Question 11

Practice objective / multiple choice question 11 from the 2022 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2022 Biology Objective / Multiple Choice Medium Difficulty
Question 11 IGCSE_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • objective

A student feels light‑headed when standing up quickly. Identify the primary type of receptor that detects the sudden fall in blood pressure and describe the immediate physiological response that restores normal pressure.

Answer Options

A. Juxtaglomerular cells; the kidneys increase renin secretion leading to angiotensin II‑mediated vasoconstriction over several hours.
B. Carotid body chemoreceptors; the medulla decreases parasympathetic activity causing a reduced heart rate and vasodilation to lower blood pressure.
Correct Answer C. Carotid sinus (and aortic arch) baroreceptors; the medulla increases sympathetic activity causing an increased heart rate and peripheral vasoconstriction to raise blood pressure.
D. Aortic stretch receptors; the hypothalamus releases antidiuretic hormone causing water retention and increased blood volume to raise pressure.
Correct Answer
C
Correct Option:
Carotid sinus (and aortic arch) baroreceptors; the medulla increases sympathetic activity causing an increased heart rate and peripheral vasoconstriction to raise blood pressure.

About This Question

This is Igcse Model Questions Vol1 2022 Biology Question 11. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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