Cell Transport

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane that requires energy.

Front

What does facilitated diffusion mean?

Back

Facilitated diffusion is the process of moving substances across a cell membrane through protein channels without using energy.

Front

What is the role of the cell membrane?

Back

The cell membrane controls what substances may enter or leave the cell, helping to maintain homeostasis.

Front

What is a concentration gradient?

Back

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

Front

Does facilitated diffusion require energy?

Back

No, facilitated diffusion does not require energy.

Front

What is the difference between active transport and passive transport?

Back

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

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium out of the cell and potassium into the cell.

Front

What happens during exocytosis?

Back

During exocytosis, materials are expelled from the cell when vesicles fuse with the cell membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle.

Front

What is homeostasis?

Back

Homeostasis is the ability of a cell or organism to maintain a stable internal environment.