Chapter 44.4, Problem 2SB

Summary Introduction

To review:

The exchange of molecules and ions with blood does not occurs in the brain as compare to most of the body tissues.

Introduction:

The capillaries have narrow spaces between the capillary endothelial cells where water, ions, small molecules can freely pass through the blood and interstitial fluid. There are some larger molecules like erythrocytes, platelets, and some plasma proteins that do not pass and get retained inside the capillary.