NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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Assertion. The role of oxygen in the regulation of respiratory rhythm is quite insignificant.

Reason: Increased

PC{O_2}

and

{H^ + }

concentration inputs from chemoreceptors can activate respiratory rhythm centre to make necessary adjustments.

View answer and explanation

Correct option: A

Both assertion and reason are true and reason is the correct explanation of assertion

Option A (Both assertion and reason are true and reason is the correct explanation of assertion) is correct because oxygen plays a minor role in regulating respiratory rhythm, while increased

PC{O_2}

and

{H^ + }

concentration stimulate chemoreceptors to adjust breathing.

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