Question

Select the set of medullary respiratory centers in Brain?

• A. Chemo-sensitive area and respiratory rhythm centre
• B. Respiratory rhythm centre and pneumotaxic
• C. Chemo-sensitive area and pneumotaxic centre
• D. Pneumotaxic centre and vomit centre.

Answer 1

Answer: (A)

Regulation of Respiration
- Neural system maintains respiratory rhythm of body according to the body needs via following parts of brain :
$1.$ Medulla : It possess :
$A.$ Respiratory rhythm centre - It is primarily responsible for regulation of respiratory rhythm.
$B.$ Chemosensitive area - It is situated adjacent to the Respiratory rhythm centre. Increase in $C{O}_2$ and $H^{+}$ concentration $\to$ Stimulation of Chemosensitive area $\to$ Sends signal to the Respiratory rhythm centre to make necessary changes in the respiratory process for the elimination of these substances.
$2.$ Pons: It possess pneumotaxic centre, that moderates the functions of the respiratory rhythm centre. Stimulation of this centre alters the respiratory rate by reducing the duration of inspiration.