The respiratory center is stimulated if the:

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Quizplus · Accepted Answer

The respiratory center is located in the medulla oblongata and can be stimulated by changes in the levels of carbon dioxide in arterial blood. An increase in carbon dioxide will cause the pH of the cerebrospinal fluid to decrease, which activates chemoreceptors that signal the respiratory center to increase breathing rate and depth, thereby eliminating excess carbon dioxide from the body. Changes in the amount of carbon dioxide in venous blood do not directly affect the respiratory center, as the blood must first be oxygenated in the lungs before it reaches the arterial circulation where it can affect brain chemistry. An increase in pH would actually inhibit the respiratory center, as it indicates a decrease in carbon dioxide levels and a corresponding decrease in the need for increased respiration.

The Respiratory Center Is Stimulated If The