Indicate which ion is involved in each event being described by using the following answer code.
-Parasympathetic stimulation increases the permeability of the SA node to _____, whereas sympathetic stimulation decreases the permeability to this same ion.

Question

Quizplus · Accepted Answer

Parasympathetic stimulation increases the permeability of the SA node to potassium ions (K+), leading to hyperpolarization and a slower heart rate. Sympathetic stimulation decreases the permeability to potassium ions, leading to depolarization and an increased heart rate.

Indicate Which Ion Is Involved in Each Event Being Described