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, typically 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 the inside of the cell, causing water to move out of the cell.

Front

Define hypotonic solution.

Back

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

Front

Define isotonic solution.

Back

An isotonic solution has an equal concentration of solutes compared to the inside of the cell, 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 role do vesicles play in transport?

Back

Vesicles are small membrane-bound sacs that transport materials within the cell during processes like endocytosis and exocytosis.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.