Cell Transport

Front

What is the sodium-potassium pump?

Back

A type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is active transport?

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is passive transport?

Back

The movement of molecules across a cell membrane without the use of energy, typically along a concentration gradient.

Front

What is osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to help move molecules across the cell membrane.

Front

What is the role of the cell membrane?

Back

To regulate what enters and leaves the cell, providing protection and structural support.

Front

What is endocytosis?

Back

The process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

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

Front

What are protein pumps?

Back

Transport proteins that use energy to move ions or molecules against their concentration gradient.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.