4. Amoeba Sisters Cell Transport

Front

What is an aquaporin?

Back

A protein that facilitates the movement of water through the cell membrane.

Front

What is exocytosis?

Back

A type of active transport where a cell releases large particles from the cell.

Front

What is passive transport?

Back

A process that does not require the cell to use ATP to move substances across the membrane.

Front

What are the characteristics of molecules that can easily pass through the cell membrane?

Back

Small and nonpolar molecules can easily pass through the cell membrane.

Front

What is facilitated diffusion?

Back

A process that allows large, polar molecules to cross the cell membrane with the help of transport proteins.

Front

What is active transport?

Back

The movement of substances against their concentration gradient, requiring energy (ATP).

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is the sodium-potassium pump?

Back

A type of active transport that moves sodium out of the cell and potassium into the cell.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is an ion channel?

Back

A protein that allows ions to pass through the cell membrane.