Diffusion and Osmosis

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is osmosis?

Back

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

Front

What does equilibrium mean in the context of diffusion?

Back

Equilibrium is the state where the concentration of molecules is evenly distributed throughout a space.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space or between two solutions.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane using energy, usually against the concentration gradient.

Front

True or False: Diffusion occurs from an area of low concentration to an area of high concentration.

Back

False. Diffusion occurs from an area of high concentration to an area of low concentration.

Front

True or False: In a solution, the solute is the substance that is dissolved.

Back

True. The solute is the substance that is dissolved in a solvent.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the role of the cell membrane in osmosis?

Back

The cell membrane regulates the movement of water and solutes in and out of the cell during osmosis.