K is required to maintain the resting potential of all cells

K^+ is required to maintain the resting potential of all cells and is responsible for the repolarization phase of action potentials in both neurons and muscle cells. K^+ is more concentrated inside cells. When you increase the extracellular K^+ concentration n, it will _______ the concentration gradient, which will _____ the potassium efflux. What do you predict will happen to heart rate and con tactility?

Solution

when you increase the extracellular K⁺ concentration ,it will decrease the concentration gradient,which will decrease the potassium efflux.

Increase in exracellular potassium ion concentration leads to inactivation of sodium ion channels and thus the potassium ion channels are opened due to which the cells become refractory..It can lead to arrhythmia.Hear rate will slow down because the conduction velocity is decreased.