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Q7 How is respiration regulated?
Answers (1)
A centre present in the medulla region of the brain called respiratory rhythm centre and it is primarily responsible for respiration regulation. And another centre which is present in the pons region of the brain called pneumotaxic centre. It can moderate the functions of the respiratory rhythm centre. The neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate.
A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO2 and hydrogen ions. An increase in these substances can activate this centre, which in turn can signal the rhythm centre to make necessary adjustments in the respiratory process by which these substances can be eliminated. Receptors associated with the aortic arch and carotid artery also can recognize changes in CO2 and H + concentration and send necessary signals to the rhythm centre for remedial actions. The role of oxygen in the regulation of respiratory rhythm is quite insignificant.
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