the primary drive to breath is elicited by which of he following:

a.reduced PO2
b.reduced PCO2
c.increased PO2
d.increased PCO2

2 answers

Try this document, which you must download:

www.health.utah.edu/healthpromotion/cep/continuingEd/..

Sra
The increase in CO2 in the blood stimulates the hypothalamus to increase breathing.

I hope this helps. Thanks for asking.