NEET BIOLOGY

Detailed explanation-1: -The pneumotaxic center is responsible for limiting inspiration, providing an inspiratory off-switch (IOS). It limits the burst of action potentials in the phrenic nerve, effectively decreasing the tidal volume and regulating the respiratory rate.

Detailed explanation-2: -Thus, during normal breathing, vagal impulse activity from stretch receptors increases with the onset of inspiration, dying down as expiration begins. Stimulation of the stretch receptors by maximally inflating the lungs in humans inhibits inspiration, thereby limiting tidal volume, and also slows respiratory rate.

Detailed explanation-3: -Pneumotaxic centre Its main role is regulation of neuronal activity from sources inhibiting dorsal respiratory group. By this action, pneumotaxic centre sets duration of inspiration for every respiratory cycle.

Detailed explanation-4: -A pneumotaxic center in the pons acts as a switch between inspiratory and expiratory signals, which are generated by inspiratory (dorsal respiratory group) and expiratory (ventral respiratory group) signaling centers located in the medulla.

Detailed explanation-5: -Final answer: The respiratory centers, which control inspiration and expiration, are located in the medulla oblongata.