Multiple Choice
An increase in heart rate is accompanied by
A) an increase in L-type Ca2+ channel activity.
B) an increase in K+ flux through voltage-gated K+ channels.
C) an increase in the passive movement of Na+ into cells of the SA node.
D) an increase in the passive movement of K+ out of cells of the SA node.
E) a combined increase in passive movement of Na+ and K+ out of the cells of the SA node.
Correct Answer:
Verified
Correct Answer:
Verified
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