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Question

Pneumotaxic centre can moderate the functions of respiratory rhythm centre by

A
Reducing the duration of inspiration
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B
Increasing the duration of inspiration only
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C
First increasing and then reducing the duration of expiration
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D
Increasing the duration of expiration only
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Solution

The correct option is A Reducing the duration of inspiration
  • Pneumotaxic centre controls the intensity of breathing, giving positive impulses to the neurons involved with inhalation.
  • The apneustic centre is inhibited by pulmonary stretch receptors and also by the pneumotaxic centre.
  • It also discharges an inhibitory impulse to the pneumotaxic centre.
  • Hence, Pneumotaxic centre can moderate the functions of respiratory rhythm centre by Reducing the duration of inspiration.
  • So, the correct answer is 'Reducing the duration of inspiration'.


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