Central Chemoreceptors Detect a Decrease in PH in Interstitial Fluids

question 70

Multiple Choice

Central chemoreceptors detect a decrease in pH in interstitial fluids in the brain. What is the response of the medulla to maintain delivery of oxygen to cells?

• A) A feedback loop is initiated that indirectly increases sympathetic activity which results in vasoconstriction and a rise in blood pressure.
• B) A feedback loop is initiated that indirectly decreases sympathetic activity which results in vasodilation and a decrease in blood pressure.
• C) A feedback loop is initiated that indirectly increases parasympathetic activity which results in vasodilation and a decrease in blood pressure.
• D) A feedback loop is initiated that indirectly increases parasympathetic activity which results in vasoconstriction and a rise in blood pressure.

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