Question

The normal excitation of the cardiac muscle cells originates from a group of cells known as
Select one:

a. Bundle of HIS

b. Sinoatrial node (SA node)

c. Purkinje fibers

d. Atrioventricular node (AV node)

CLEAR MY CHOICE

Question 2

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Answer 1

Answer:

The normal excitation of the cardiac muscle cells originates from a group of cells known as sinoatrial node (SA node).