Diffusion and Osmosis

Front

What is diffusion?

Back

Diffusion is the process where molecules move from a high concentration to a low concentration.

Front

Where is there a low concentration of dye in a cup?

Back

At the bottom of the cup.

Front

What travels up a person's nose when they smell something?

Back

Molecules.

Front

What is the definition of Selective Permeability?

Back

Selective Permeability is the ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

Front

Which way do water molecules move during osmosis when a cell is in a hypertonic solution?

Back

Out of the cell, so the cell shrinks.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

Front

What happens to a cell in a hypotonic solution?

Back

The cell swells as water moves into it.

Front

What is the role of the cell membrane in diffusion?

Back

The cell membrane controls the movement of substances in and out of the cell.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across the cell membrane via specific transmembrane integral proteins.