Cell Transport

Front

What process occurs when WATER diffuses across a membrane?

Back

Osmosis

Front

During osmosis, what direction does water move?

Back

Water moves from high to low concentration.

Front

What does selectively-permeable mean?

Back

The cell controls what passes in and out of the cell.

Front

What is diffusion?

Back

The movement of particles from areas of high concentration to areas of low concentration.

Front

Why are diffusion and osmosis important to cells?

Back

They allow cells to take in materials without using energy.

Front

What is the main difference between diffusion and osmosis?

Back

Diffusion involves all types of particles, while osmosis specifically involves water.

Front

What is a concentration gradient?

Back

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

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What role do transport proteins play in cell transport?

Back

They help move substances across the cell membrane that cannot directly diffuse through.

Front

What is active transport?

Back

The movement of molecules across a cell membrane using energy, usually against a concentration gradient.