7.3 Cell Transport

Front

What is active transport?

Back

A type of cell transport that requires energy to move materials against a concentration difference.

Front

Does active transport require cellular energy?

Back

True

Front

What is osmosis?

Back

The diffusion of water through a selectively permeable membrane.

Front

What role do proteins play in cell membranes?

Back

They act as carriers or channels, facilitating the movement of certain molecules across the membrane.

Front

What is passive transport?

Back

The movement of materials across the cell membrane without using cellular energy.

Front

What is the main difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.

Front

What is a selectively permeable membrane?

Back

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

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is the sodium-potassium pump?

Back

A type of active transport that moves sodium ions out of the cell and potassium ions into the cell.

Front

What is facilitated diffusion?

Back

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