What is the pacemaker of the heart?
A) Purkinje fibers
B) Atrioventricular node
C) Atrioventricular valve
D) Sinoatrial node
Correct Answer:
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Q27: Which of the following is NOT a
Q28: During depolarization, which of the following ion
Q29: During depolarization,
A) Sodium channels open, potassium channels
Q30: During final repolarization,
A) Sodium channels close, potassium
Q31: Absolute refractory period in cardiac muscle extends
Q33: When the SA node depolarizes and the
Q34: What ion is primarily responsible for the
Q35: When the SA node depolarizes, which of
Q36: What part of the conducting system of
Q37: Which of the following is the correct
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