Diffusion and 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 until equilibrium is reached.

Tags

NGSS.MS-LS2-3

Front

What is osmosis?

Back

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

Front

What happens to the cell membrane during osmosis in plant cells?

Back

The cell membrane shrinks away from the cell wall when water moves out of the cell.

Front

What remains unchanged in plant cells during osmosis?

Back

The cell wall remains unchanged.

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 required for active transport?

Back

Active transport requires energy to move substances against their concentration gradient.

Front

What is the main driving force behind diffusion?

Back

The concentration gradient is the main driving force behind diffusion.

Front

What type of molecules can easily diffuse through the cell membrane?

Back

Small, nonpolar molecules such as oxygen and carbon dioxide can easily diffuse through the cell membrane.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.

Front

What is the end result of diffusion?

Back

The end result of diffusion is the equal distribution of molecules throughout a space.