Diffusion and Osmosis

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas 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 an area of low solute concentration to an area of high solute concentration.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move large or polar molecules across the cell membrane.

Front

What does isotonic mean?

Back

Isotonic refers to a solution that has the same concentration of solutes as another solution, resulting in no net movement of water.

Front

What does hypertonic mean?

Back

Hypertonic refers to a solution that has a higher concentration of solutes compared to another solution, causing water to move out of the cell.

Front

What does hypotonic mean?

Back

Hypotonic refers to a solution that has a lower concentration of solutes compared to another solution, causing water to move into the cell.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in large molecules or particles by engulfing them in a membrane vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel large molecules or particles by fusing a vesicle with the cell membrane.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules.