Multiple Choice
What is the cardiac cycle?
A) the alternating relaxation and contraction of the heart chambers
B) the movement of blood from the heart to the lungs and then back to the heart
C) the passage of electrical impulses from the AV node to the SN node to heart muscle
D) the movement of blood from systemic to pulmonary circulation
Correct Answer:
Verified
Correct Answer:
Verified
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