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Multiple Choice
The pH of the cerebrospinal fluid is monitored by which of these brainstem centers?
A
Thalamus
B
Cerebellum
C
Medullary chemoreceptors
D
Pons
Verified step by step guidance
1
Understand that the pH of cerebrospinal fluid (CSF) is crucial for maintaining homeostasis in the brain, as it affects the function of neurons and other cells.
Recognize that the brainstem contains several centers that are involved in monitoring and regulating various physiological parameters, including the pH of the CSF.
Identify the medullary chemoreceptors as the specific brainstem center responsible for monitoring the pH of the cerebrospinal fluid. These chemoreceptors are located in the medulla oblongata, which is part of the brainstem.
Learn that the medullary chemoreceptors detect changes in the pH of the CSF by sensing the concentration of hydrogen ions (H+) and carbon dioxide (CO2) levels, which are closely related to pH.
Understand that when the pH of the CSF changes, the medullary chemoreceptors send signals to the respiratory centers in the brainstem to adjust the rate and depth of breathing, thereby helping to regulate the pH back to normal levels.