Membrane Transport

Front

What is membrane transport?

Back

The process by which substances move across the cell membrane, either entering or leaving the cell.

Front

What is active transport?

Back

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

Front

What is passive transport?

Back

The movement of substances across the cell membrane without the use of energy, following their concentration gradient.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses protein channels to help move substances across the membrane.

Front

What is a hypertonic solution?

Back

A solution that has a higher concentration of solutes compared to the inside of the cell, causing the cell to shrink.

Front

What is a hypotonic solution?

Back

A solution that has a lower concentration of solutes compared to the inside of the cell, causing the cell to swell.

Front

What is isotonic solution?

Back

A solution that has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What role do protein channels play in membrane transport?

Back

They facilitate the movement of specific molecules across the cell membrane, especially during facilitated diffusion.

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.