Chapter 3- Diffusion and Osmosis

The movement of nutrients from an area of high concentration to an area of low concentration.

Diffusion

The movement of water to a high concentration of solutes

Osmosis

Substances that are able to dissolve other substances

For ex. Water

Solvents

Substances that dissolves into solvents

For ex. Sugar

Solutes

Mixtures of solvents and solutes

For ex. Water and sugar

Solutions

Describes a higher concentration of solution outside of the cell than inside of the cell

Hypertonic

Describes a lower concentration of solutions outside the cell than inside the cell

Hypotonic

Describes a solution that is the same concentration of solutions inside and outside of cell

Isotonic

The ability of a cell to control what materials leave or enter the cell

Selective Permeability

How does Diffusion work in a cell?

The solutes slowly move from outside of the cell, where the concentration is high, to the inside of the cell, where concentration is low.

How does Osmosis work in a cell?

The water slowly leaves the cell (where the concentration is low) and moves to the outside of the cell (where concentration is high)