Diffusion/Osmosis

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

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 happens when the concentration of water is equal inside and outside a cell?

Back

There will be no movement of water cells.

Front

During osmosis, water moves from:

Back

High concentration to low concentration.

Front

What is a concentration gradient?

Back

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

Front

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

Back

At the bottom of the cup.

Front

What type of molecules require energy to move in or out of the cell?

Back

Big molecules.

Front

What is the role of the cell membrane in diffusion?

Back

The cell membrane allows certain molecules to pass through while blocking others, facilitating diffusion.

Front

What is meant by selectively permeable membrane?

Back

A selectively permeable membrane allows some substances to pass through while preventing others.

Front

What is the difference between passive transport and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.