Topic Three (1.3): Movement In and Out of Cells

Introduction

 

In this third topic, you will learn about the ways in which water and other essential biological molecules are moved into and out of cells. You will learn about diffusion and osmosis and how these processes can be affected by environmental factors such as temperature or concentration gradients. 

The following key areas are covered in this topic:

• Diffusion
• Osmosis

Topic Three is broken down into the following study sessions:

Session One (1.3.1): Diffusion and Factors Affecting Diffusion Rates

Session Two (1.3.2): Osmosis and Concentration Gradients

Session Three (1.3.3): Active Transport

Session Four (1.3.4): Investigating Osmosis