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.