Why are COPD patients with chronic hypercapnia unable to hyperventilate to decrease their PaCO2?
A) The central chemoreceptors respond only to O2 concentration changes, not to changes in CO2.
B) The central chemoreceptors are insensitive to acute or chronic changes in PaCO2.
C) The central chemoreceptors respond to [H+], not the CO2 molecule.
D) The central chemoreceptors do not respond to changes in hydrogen ion concentration or PaCO2.
Correct Answer:
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