NEET Biology Breathing And Exchange Of Gases Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

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Breathing And Exchange Of Gases Topic Based

Question & Answer Discuss:

The urge to inhale in humans results from

(a) rising p$O_{2}$

(b) rising pC$O_{2}$

(c) falling pC$O_{2}$

(d) falling p$O_{2}$

Answer: (b)

The urge to inhale in humans results from rising $pCO_{2}$ . It is the increase of blood levels of carbon dioxide ($PCO_{2}$) that causes the urge to breathe in, not a lack of dissolved oxygen ($PO_{2}$).

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