question_answer 24)

  Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation. (a) Modularly inspiratory centre                                (b) Pneumotaxic centre (c) Apneustic centre                                       (d) Chemo sensitive centre

Answer:

                  (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 pons varoli is responsible for promoting inspiration process. Chemo sensitive Centre is situated adjacent to the rhythm centre which is highly sensitive to  and hydrogen ions. Increase in  and in body and activates this centre for the elimination of  and H Modularly Inspiratory Centre is a specialised region present in medulla of the brain, and is primarily responsible for regulating the respiratory rhythm.