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Question 9297
NEET Biology · Medium

Breathing and Exchange of Gases: CO2 sensitivity MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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CO2 sensitivityMediumQuestion 9297

Question

Why is carbon dioxide considered a strong regulator of breathing?

  1. A
    Its rise quickly alters blood pH and stimulates respiratory centres
    Correct
  2. B
    It directly becomes oxygen
  3. C
    It blocks lung expansion
  4. D
    It is stored in cartilage rings

Correct answer

Its rise quickly alters blood pH and stimulates respiratory centres

Explanation

CO2 influences acidity, and these changes are sensed by chemoreceptors controlling ventilation.

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