Ncert Exercises & Solutions

Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation

1.	Medullary inspiratory centre
2.	Pneumotaxic centre
3.	Apneustic centre
4.	Chemosensitive centre

(b) Pneumotaxic Centre - Located in the dorsal part of pons varoli of the brain can reduce the duration of inspiration and thus alter the respiratory rate .Apneustic Centre- Whereas is located in the lower part of ponsvaroli is responsible for promoting inspiration process. Chemosensitive Centre- is situated adjacent to the rhythm centre which is hight sensitive to carbondioxide and hydrogen ions. Increase in carbondioxide and H⁺ inbody and activates this centre for the elimiration of carbondioxide and hydroge

Medullary Inspiratory - Centre is a specialised region present in medulla of the brain, and is primarily responsible for regulating the respiratory rhythm.

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