The following questions refer to the accompanying diagram of arteriole vasoconstriction and vasodilation. The diagram shows three state of arteriole tone. The top image labeled "A," shows normal tone. The other two panels labeled "B" and "C" show different state of arteriole tone. Match the statements below with the correct arteriole using A, B, and C.
-Caused by increased levels of carbon dioxide
Definitions:
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