Osmosis: The Science of Water Movement in Cells

Osmosis: The Science of Water Movement in Cells

Learning Objective

At the end of the lesson, you will understand osmosis and its importance in cell processes.

What do you already know about osmosis?

What is Osmosis?

Osmosis is the movement of water across a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration.

Semi-Permeable Membrane

A semi-permeable membrane allows certain molecules or ions to pass through it by diffusion and occasionally specialized processes.

Concentration Gradient

A concentration gradient occurs when the concentration of particles is higher in one area than another.

The Importance of Osmosis

Osmosis regulates water balance in cells, influences nutrient absorption, and maintains cell structure.

Osmosis in Plant Cells

Osmosis helps maintain turgor pressure in plant cells, keeping them rigid and upright.

Osmosis in Animal Cells

Animal cells balance osmosis to prevent shrinking or bursting, maintaining homeostasis.

Osmosis Experiment

Demonstrate osmosis using a potato in saltwater: observe water movement and changes in size.

Common Misconceptions

Osmosis is not the same as diffusion; it specifically involves water across membranes.

Formative Assessment

Quiz: Define osmosis, describe its role in cells, and explain how a concentration gradient influences it.

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.