What is the affect on the cardiovascular medullary centers when the cerebral carbon dioxide is low?
a. Excitatory
b. Inhibitory
c. No affect
d. Increased vascular tone
ANS: B
The cardiovascular centers are also affected by local chemical changes in the surrounding blood and cerebrospinal fluid. For example, decreased levels of carbon dioxide tend to inhibit the me-dullary centers.
Health Professions
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Which of the following is NOT an observation that should be made during hydrant inspections?
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