Learn: Diffusion and Osmosis

Welcome!Today we'll learn about diffusion and osmosis. These processes are how substances move in and out of cells. Let’s explore how they work and why they are important!

What is Diffusion?Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. It happens naturally and doesn’t require energy. For example, oxygen diffuses into cells for respiration.

What is Osmosis?Osmosis is the movement of water across a selectively permeable membrane (only certain substances can pass through it). Water moves from an area of high water potential (more water) to low water potential (less water).

Why Are These Processes Important?Diffusion allows essential gases like oxygen to enter cells and waste gases like carbon dioxide to leave. Osmosis helps regulate water levels in cells, preventing dehydration or bursting.

How Do Membranes Work?Cell membranes are selectively permeable, meaning they only allow certain substances, like water, to pass through. This is essential for processes like osmosis and diffusion in cells.

Review Time!Great work! You've learned about diffusion, osmosis, and their importance to cells. Now let’s test your understanding with a few questions.