Passive and Active Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, moving from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, moving from an area of low concentration to an area of high concentration.

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing water to move out of the cell.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing water to move into the cell.

Front

Define isotonic solution.

Back

An isotonic solution has an equal concentration of solutes compared to another solution, resulting in no net movement of water.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane.

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins assist in the movement of larger or polar molecules across the cell membrane that cannot pass freely.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.