Active Transport

Front

What is active transport?

Back

Active transport is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy, typically from a region of higher concentration to a region of lower concentration.

Tags

NGSS.MS-LS1-2

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Tags

NGSS.HS-LS1-3

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane.

Front

What is the role of ATP in active transport?

Back

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

Front

What is a concentration gradient?

Back

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