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  4. Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiration duration upon stimulation

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Q. Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiration duration upon stimulation

NTA AbhyasNTA Abhyas 2020

Solution:

The number of groups of neurons are located in the medulla oblongata which controls the respiratory rhythm. These regions are called as respiratory centres. There are three groups of respiratory centres named as dorsal respiratory group, ventral respiratory group and pneumotaxic centre. The pneumotaxic centre is dorsally located in the upper pons and controls the switch off point of inspiration. The strong signal causes increased rate of breathing because inspiration and expiration both gets shortened. The concentration of hydrogen ions, carbon dioxide cause increased strength of inspiratory and expiratory signal. However, oxygen has no direct effect on these signals.