Peripheral chemoreceptors are the only receptors that respond directly to which of the following stimuli?
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Correct answer: A decrease in arterial PO2
Central chemoreceptors are shielded by the blood-brain barrier and respond primarily to CO2-induced H+ changes in the CSF. Peripheral chemoreceptors are unique in their ability to respond to arterial hypoxia (low PO2) and arterial pH changes.
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