Multiple Choice
Acetylcholine slows the heart because it
A) opens potassium ion channels in SA node cells.
B) causes the pacemaker potential to depolarize more slowly.
C) causes the pacemaker potential to depolarize more quickly.
D) opens sodium- calcium ion channels in SA node cells.
E) A and C only
Correct Answer:
Verified
Correct Answer:
Verified
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