Question

Neural signal from which centre can reduce the duration of inspiration is

• A. chemosensitive area
• B. respiratory rhythm centre
• C. pneumotaxic centre
• D. receptors associated with aortic arch and carotid artery

Answer 1

Answer: (C)

A centre present in the pons region of the brain called pneumotaxic centre can moderate the functions of the respiratory rhythm centre.
Neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate. In human beings, in each breath, inspiration accounts for $2$ seconds and expiration accounts for $3$ seconds. When the pneumotaxic centre is more active, breathing rate is more rapid.