Front

What is osmosis?

Back

The movement of water from an area of high concentration to an area of low concentration through a semipermeable membrane.

Front

What is diffusion?

Back

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

Front

What does it mean for a cell membrane to be semipermeable?

Back

It means that the cell membrane only allows certain substances to pass through while blocking others.

Front

What is exocytosis?

Back

A form of active transport where large particles exit a cell by the cell membrane fusing with the vesicle containing the particles.

Front

What is endocytosis?

Back

A form of active transport where a cell engulfs large particles by wrapping its membrane around them.

Front

What is active transport?

Back

The movement of substances across a cell membrane that requires energy, usually against a concentration gradient.

Front

What is passive transport?

Back

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

Front

What is a concentration gradient?

Back

A difference in the concentration of a substance across a space, which drives the movement of molecules.

Front

What is the role of the cell membrane?

Back

To protect the cell and regulate what enters and exits, maintaining homeostasis.

Front

What is a vesicle?

Back

A small membrane-bound sac that transports substances within a cell.