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NEETZoologyBreathing and Exchange of Gases

Under normal physiological conditions, what volume of carbon dioxide is delivered to the alveoli by every 100 ml of deoxygenated blood?

Options

  1. A5 ml
  2. B4 ml
  3. C10 ml
  4. D20 ml

Correct answer

B. 4 ml

Step-by-step solution

According to NCERT, every 100 ml of deoxygenated blood delivers approximately 4 ml of CO ₂ to the alveoli. The value 5 ml corresponds to the amount of O ₂ delivered to the tissues by every 100 ml of oxygenated blood, while 20 ml is the approximate total carrying capacity of oxygen per 100 ml of blood. Answer: 4 ml

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