How Diffusion Works
Science · Organisms & Life Processes · conceptual
Explain diffusion as the net movement of particles from a region of higher concentration to lower concentration, and describe its role in moving materials (oxygen, carbon dioxide, glucose) in and between cells
What mastery looks like
- Defines diffusion using particle theory
- Explains the direction of diffusion of oxygen and carbon dioxide at the alveoli
- Explains how cells get glucose from the blood using diffusion
- Identifies factors that affect the rate of diffusion (concentration gradient, surface area, distance)
Check your understanding
If How Diffusion Works was asked why oxygen moves from the lungs into the blood without the body needing to pump it, could they explain what diffusion is and why it always moves in one particular direction?
Prerequisites
Required first