Answer : B-depressed
Explanation:
The respiratory centers in the brain is located in the brainstem. When the blood PH changes, some receptors in the brain called chemoreceptors are sensitized and activates the respiratory centers to adjust the rate of respiration in a bit to change the PH back to normal. This can be by increasing or decreasing ventilation rate.
In the case of increased blood PH which signifies a decrease in the level of Co2, The respiratory control centers are depressed to decelerate ventilation rate in a bid to increase the level of carbon dioxide levels and PH to normal levels. .
