Final answer:
The central chemoreceptors in the brain increase breathing rate and depth when the pH of the CSF decreases. This response helps eliminate excess carbon dioxide from the body.
Step-by-step explanation:
The central chemoreceptors in the brain increase the rate and depth of breathing when the pH of the CSF decreases. Changes in the pH of cerebrospinal fluid (CSF) affect the respiratory center in the medulla oblongata, which can directly modulate breathing rate to bring the pH back into the normal range. When the pH decreases, indicating higher levels of carbon dioxide and increased acidity in the blood, the chemoreceptors stimulate the respiratory centers to increase breathing rate and depth, leading to the elimination of excess carbon dioxide from the body.
Under normal conditions, the central chemoreceptors in the brain increase the rate and depth of breathing when the pH of the CSF decreases due to an increase in CO2, which results in the lowering of pH.
The central chemoreceptors in the brain increase the rate and depth of breathing when the pH of the CSF decreases. This is because an increased concentration of carbon dioxide (CO2) in the blood leads to an increase in hydrogen ions (H+), which lowers the pH of the cerebral spinal fluid (CSF). When the pH drops, it is detected by the central chemoreceptors located in the medulla oblongata, which then stimulate the respiratory centers to increase respiration, expelling more CO2 and thereby correcting the pH imbalance.