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Question 9226
NEET Biology · Medium

Breathing and Exchange of Gases: Chemical control MCQ

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Chemical controlMediumQuestion 9226

Question

The strongest normal chemical stimulus for increasing breathing rate is usually a rise in:

  1. A
    Carbon dioxide concentration
    Correct
  2. B
    Blood urea
  3. C
    Sodium chloride in sweat
  4. D
    Liver glycogen

Correct answer

Carbon dioxide concentration

Explanation

Elevated CO2 and the associated fall in pH strongly stimulate respiratory centres.

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