Zoology · Breathing and Exchange of Gases

NEET (UG) 2024 — Question 172

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

Option A:
High $pO_2$ and high $pCO_2$
Option B:
High $pO_2$ and lower $H^+$ concentration
Correct
Option C:
Low $pCO_2$ and high $H^+$ concentration
Option D:
Low $pCO_2$ and high temperature

Answer: B

Step-by-step solution

Oxyhaemoglobin formation is the reversible binding $\ce{O2 + Hb <=> HbO2}$ . At the alveoli, the high $pO_2$ shifts this equilibrium to the right, favouring $\ce{HbO2}$ . Lower $H^+$ concentration means higher pH, which increases haemoglobin's oxygen affinity. Low $pCO_2$ and low temperature also favour oxygen loading. Among the options, high $pO_2$ with lower $H^+$ concentration (option B) contains only favourable factors.

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Exam: NEET (UG) 2024
Paper: 2024 paper
Subject: Zoology
Chapter: Breathing and Exchange of Gases
Topic: Transport of Oxygen

Match List I with List II : List I List II --- --- --- --- A. Expiratory capacity I. Expiratory reserve volume + Tidal volume + Inspiratory…

Answer: B

Step-by-step solution

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