What is the most powerful stimulus of the medullary respiratory centers?
A) increased H+ in CSF
B) increased PaCO₂
C) decreased PaO₂
D) decreased PaCO₂ in CSF

Question

Quizplus · Accepted Answer

Increased H+ in the cerebrospinal fluid (CSF) is the most powerful stimulus for the medullary respiratory centers because it directly reflects changes in CO2 levels, which cross the blood-brain barrier and are converted to H+ in the CSF.

What Is the Most Powerful Stimulus of the Medullary Respiratory