Unit 3: Cell Biology - Cell Transport

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

Front

What does active transport require?

Back

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

Front

What is the role of the cell membrane?

Back

The cell membrane helps maintain homeostasis by controlling what substances may enter or leave the cell.

Front

What does 'high concentration area' mean?

Back

A high concentration area means that molecules are tightly packed together.

Front

How does temperature affect diffusion?

Back

An increase in temperature speeds up diffusion.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in concentration of a substance between two areas.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting substances across a cell membrane with the help of carrier proteins.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment.