The main function of the AV node is to
A) relay the signal for the heart to contract from the right ventricle to the right atrium.
B) initiate the heartbeat.
C) relay a signal for the ventricles to contract.
D) set the rhythm of the heartbeat.
Correct Answer:
Verified
Q33: Blood flow through capillaries is controlled by
A)precapillary
Q34: Which of the following statements about blood
Q35: Which part of this figure depicts an
Q36: In humans,which blood vessels have valves?
A)arterioles
B)capillaries
C)arteries in
Q37: Which of the following can increase red
Q39: Arteries are distinguished from veins based on
Q40: Which of the following is characteristic of
Q41: The two basic types of circulatory systems
Q42: What type of blood vessel is solely
Q43: The largest blood vessel in the human
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