Introduction

How does the cell membrane do its job of being a protective barrier?


A6.1 Cell membrane structure
The cell membrane is actually a very complex organelle. It has some very interesting properties, and its structure is something we have modelled many technologies after.

In this lesson, we will go through the structure of the cell membrane and how it allows some materials in but keeps others out. We will talk about the importance of the cell membrane in keeping materials balanced inside and outside of the cell. 

  Targets

By the end of this lesson, you will be able to

  • describe the role of the cell membrane in maintaining equilibrium while moving matter into and out of the cell
  • compare passive transport by diffusion and osmosis with active transport using the particle model of matter, concentration gradients, equilibrium, and protein carrier molecules
  • use models to explain and visualize diffusion and osmosis, endocytosis and exocytosis, and the role of the cell membrane

  Watch This


Cell Membranes Are Way More Complicated Than You Think © YouTube Ted-Ed  


Watch this video for information on the cell membrane. It goes into detail about the structure of the cell membrane and the function of the proteins found within it. You should focus on the fluid-mosaic model mentioned.