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Why are funny channels "funny" (different from other channels)? Because they allow Na + to
move out of the cell instead of into the cell Because they are the only kind of channel that will
open in response to changes in voltage Because they open in response to membrane
hyperpolarization instead of depolarization Because they aren't really channels at all and actually
block ions from entering cardiac cells All of the above are correct True or False? Increased
sympathetic activity will cause the volume of blood pumped by the ventricles per heartbeat to
decrease. True False

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