Chapter 13, Problem 9P

Interpretation Introduction

Interpretation:

The reason for ${\text{Na}}^{+}$ channels to allow sodium ions to enter the cell and ${\text{K}}^{+}$ channel to allow potassium ions to exit the cell needs to be explained.

Concept introduction:

Diffusion is defined as the movement of particles such as atoms, molecules or ions from a higher concentration region to a lower concentration region. This process is continued till the concentration of the particles is same on both sides of the membranes or boundary.

In the body, the diffusion of ions/molecules/atoms takes place inside or outside of the cell through the cell membrane.