Multiple Choice
The SA is the heart's normal pacemaker because
A) It has the fastest rate of autorhythmicity.
B) It has both sympathetic and parasympathetic innervation.
C) It lies in the right atrium.
D) Activation of K+ channels occurs more rapidly in this region than elsewhere in the heart.
E) None of these.
Correct Answer:
Verified
Correct Answer:
Verified
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