1. Low pCO₂ and High temperature 2. High pO₂ and High pCO₂ 3. High pO₂ and Lesser H^+ concentration 4. Low pCO₂ and High H^+ concentration

Topic: Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders· Human Physiology

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

1. Low \(pCO_2\) and High temperature

2. High \(pO_2\) and High \(pCO_2\)

3. High \(pO_2\) and Lesser \(H^+\) concentration

4. Low \(pCO_2\) and High \(H^+\) concentration

Doubtly Asked 30 Oct 2026 NEET UG 2024 Practice test neet Save WhatsApp Report

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Answer: 3. High \(pO_2\) and Lesser \(H^+\) concentration

Key idea: oxygen binding is favoured in the alveoli.

Alveoli have high pO₂, low pCO₂, lower H⁺ concentration (higher pH) and lower temperature. These shift the curve left and promote oxyhaemoglobin formation. Only option 3 (high pO₂ and lesser H⁺) fits; the others contain high temperature, high pCO₂ or high H⁺, which favour release of oxygen.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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

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