In humans,the concentration of carbon dioxide | vedclass

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(C) The medulla oblongata,located at the base of the brain,acts as a respiratory rhythm center. When the concentration of $CO_2$ in the blood plasma i

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regulates breathing rate by its effect on the medulla.

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(C) The medulla oblongata,located at the base of the brain,acts as a respiratory rhythm center. When the concentration of $CO_2$ in the blood plasma increases,it leads to a decrease in blood $pH$. This change is detected by chemoreceptors,which send signals to the medulla oblongata. In response,the medulla increases the breathing rate to expel excess $CO_2$ from the body. Therefore,the concentration of $CO_2$ regulates the breathing rate by its effect on the medulla.

In humans,the concentration of carbon dioxide in the plasma

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