Indicate Which Chemical Factor Is Responsible for the Effect Described

Multiple Choice

Indicate which chemical factor is responsible for the effect described by using the answer code (options may be used more than once or not at all) :
-directly stimulates the central chemoreceptors and represents the dominant control of ventilation

A) arterial PO₂ between 60 to 100 mmHg
B) arterial PO₂ less than 60 mmHg
C) arterial PCO₂ increased above normal
D) brain ECF H⁺ increased above normal
E) arterial H⁺ increased above normal