Biochemistry for Nurses

2

Structure and Functions of Cell Membrane

CHAPTER OBJECTIVES

2.1 Fluid–mosaic model

2.2 Cytoskeleton and cell–cell interaction

2.3 Transport mechanism across plasma membrane

2.4 Acid–base balance: blood pH, buffering and diagnosis

2.5 Chemistry of water: pH and buffers

2.6 Water electrolyte balance

2.1. FLUID–MOSAIC MODEL

Between the living machinery inside a cell and the harsh conditions of the outside world stands the cell's plasma membrane which serves as a barrier. The plasma membrane consists of both lipids and proteins. While lipids are the fundamental structural elements of membranes, proteins are responsible for carrying out specific membrane functions. Most plasma membranes consist of approximately 50 per cent lipid and 50 per ...