What acts as a pacemaker,initiating the heartbeat?
A) Nerves
B) AV node
C) SA node
D) Brain
Correct Answer:
Verified
Q31: The pathway from the superior and inferior
Q32: The first heart sound,"lub," is made by
A)closure
Q33: Which of the following represents the correct
Q34: What structural component of cardiac muscle cells
Q35: The sound of a heart murmur is
Q37: The pulmonary vein
A)carries oxygen-rich blood from lungs
Q38: What is the condition in which the
Q39: The second heart sound,"dup," is caused by
Q40: In an ECG,the T wave represents
A)depolarization of
Q41: The amount of blood pumped out of
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