Cell Transport

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane from a low concentration to a high concentration, requiring energy (ATP).

Front

What is passive transport?

Back

Passive transport is the movement of substances through a cell membrane from a high concentration to a low concentration without the use of energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help larger or polar molecules cross the cell membrane.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion.

Front

What role does ATP play in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion refers to the movement of any substance from high to low concentration, while osmosis specifically refers to the movement of water.

Front

What is an example of a substance that uses facilitated diffusion?

Back

Glucose is an example of a substance that uses facilitated diffusion to enter cells through specific protein channels.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that 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.