Q.

Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is achieved by
 a) Arterial system                          b)    Systemic vein system
 c) Neural system                           d)    Cardiac system

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A.

c) Neural system in humans regulates and modulates the respiratory rhythm.
Respiratory centre is located in the medulla oblongata and pons varoli. These centre regulates the rate and the depth of breathing by controlling the contraction of diaphragm and other respiratory muscles
Medulla oblongata contains inspiratory rhythm centre in the dorsal portion of the respiratory centre or in ventral portion of the brain.

 



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