Chapter 9, Problem 8CT

Summary Introduction

Case summary:

The high concentrations of potassium ions cause depolarization of the resting membrane potential.

Adequate information:

Increase in the blood potassium levels can lead to vasodilation because smooth muscles make up the blood vessels.

To determine:

The effect of increased blood potassium levels on smooth muscle function.

Given information:

The depolarization of the resting membrane potential is caused by the high concentration of potassium ions.

Introduction:

The action potential comprises of two phases:

1. Depolarization
2. Repolarization

The stimulation of cell causes the depolarization to occur due to which the plasma membrane gets positively charged from inside. Repolarization leads to returning of membrane potential to resting value.