How is respiratory movements regulated in Man?

Explanation

A. Respiratory movements are regulated in man by neural system. 1) A special centre present in the medulla region of brain called Respiratory rhythm centre is primarily responsible for this regulation
2) Another centre present in the pons of the brain stem called .Pneumotaxic Centre. can moderate the functions of the .respiratory rhythm centre.. Neural signal from this centre can reduce the duration of inspiration and there by alter the respiratory rate
Achemo-sensitive area is situated adjacent to the respiratory rhythm centre which is highly sensitive to `Co_(2)` and hydrogen ions. Increase in these substances can activate this centre, which inturn can send signals to the respiratory rhythm centre to make necessary adjustments in the respiratory process by which these substances can be eliminated
4) Receptors associated with aortic arch and carotid artery also recognize changes in `Co_(2)` and `H^(+)` concentration and send necessary signals to the respiratory rhythm centre for necessary actions (increase in the rate and depth of breathing when their concentration is high). The role of oxygen in the regulation of the respiratory rhythm is quite insignificant