The breathing centre initiates the ventilatio | vedclass

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(C) The respiratory rhythm centre in the medulla region of the brain is primarily responsible for the regulation of respiration.It initiates ventilati

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Increase of $CO_{2}$ in arterial blood

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(C) The respiratory rhythm centre in the medulla region of the brain is primarily responsible for the regulation of respiration.It initiates ventilation in response to the following chemical stimuli in the arterial blood:$(i)$ Increase in the concentration of $CO_{2}$ (hypercapnia).$(ii)$ Decrease in $pH$ levels (increased acidity).$(iii)$ Increase in $H^{+}$ ion concentration.Chemosensitive areas located near the rhythm centre are highly sensitive to $CO_{2}$ and $H^{+}$ ions,which trigger the respiratory centre to increase the rate of breathing to eliminate excess $CO_{2}$.

The breathing centre initiates the ventilation in response to

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