The ____________ is(are) referred to as the pacemaker of the heart.
A) AV bundle
B) AV node
C) SA node
D) Ventricular fibers
Correct Answer:
Verified
Q33: The T wave of an ECG is
Q34: The systemic circuit carries _ blood from
Q35: The atria receive the impulses from the
A)SA
Q36: The pulmonary veins carry _ blood to
Q37: The contraction phase of a cardiac cycle,
Q39: When the right atrium contracts, the
A)left atrium
Q40: The P wave of an ECG is
Q41: Arteries contain _ than veins.
A)more smooth muscle
Q42: _ play an important role in controlling
Q43: Exchange of dissolved substances between the blood
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