In the face of hyperoxia, what is the response of the peripheral chemoreceptors to hypercapnia?
a. There is a decreased drive to breathe.
b. There is an increased drive to breathe.
c. There is insufficient information.
d. There is virtually no response.
ANS: D
High arterial PO2 (hyperoxia) decreases the peripheral chemoreceptors' PCO2 sensitivity to al-most zero.
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