Multiple Choice
What effect does caffeine have on the circulatory system?
A) It causes the heart to pump slowly and thus more efficiently.
B) It enhances the exchange of oxygen and carbon dioxide in capillaries.
C) It reduces blood flow in veins that service the heart.
D) It causes blood vessels in the brain to constrict.
E) It reduces blood flow to the brain.
Correct Answer:
Verified
Correct Answer:
Verified
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