Fluid Mosaic Model

Fluid mosaic model of a cell membrane

The plasma membrane, also known as the cell surface membrane or plasmalemma, defines the boundary of the cell. They are a special type of membranes which are lipid structures that … Read more

Passive Transport

Passive Transport

Plasma membranes must allow certain substances to enter and leave a cell, and prevent some harmful materials from entering and some essential materials from leaving. In other words, plasma membranes … Read more

Membrane Proteins

Membrane Proteins

Biological membranes consist of a continuous double layer of lipid molecules in which membrane proteins are embedded. Although the lipid bilayer provides the basic structure of biological membranes, the membrane … Read more