What initiates the heartbeat and is called the pacemaker?
A) nerves
B) AV node
C) SA node
D) brain
Correct Answer:
Verified
Q18: The right atrium
A)receives oxygen rich blood from
Q19: What valve is found between the left
Q20: Which of the following is NOT a
Q21: What structural component of cardiac muscle cells
Q23: An area other than the SA node
Q24: The heart sounds are due to the
A)valves
Q24: In an ECG,the T wave represents
A)depolarization of
Q25: A heart rate below 60 beats per
Q26: The pathway from the superior and inferior
Q32: The first heart sound,"lub," is made by
A)closure
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