Cell Membrane and Cell Transport

Front

What is the cell membrane?

Back

A biological membrane that separates and protects the interior of a cell from the external environment.

Front

Define passive transport.

Back

A biological process that allows substances to move across a cell membrane without the use of energy.

Front

Give an example of passive transport.

Back

Diffusion.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.

Front

What is active transport?

Back

Movement of molecules across a cell membrane against the concentration gradient, requiring energy.

Front

Give an example of active transport.

Back

Sodium-potassium pump.

Front

What is facilitated diffusion?

Back

A process of passive transport that uses transport proteins to move molecules across the cell membrane.

Front

What role do cell walls play?

Back

They provide structure and support, helping to maintain homeostasis in plant cells.

Front

What is the concentration gradient?

Back

The difference in the concentration of a substance across a space.

Front

What is endocytosis?

Back

A process by which cells engulf substances from the outside environment, bringing them into the cell.