Passive vs Active Transport

Front

What is Active Transport?

Back

Active Transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy in the form of ATP.

Front

What is Passive Transport?

Back

Passive Transport is the movement of molecules across a cell membrane without the use of energy, occurring from a region of higher concentration to a region of lower concentration.

Front

What is Osmosis?

Back

Osmosis is the passive transport of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is Diffusion?

Back

Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What does 'against the concentration gradient' mean?

Back

'Against the concentration gradient' refers to the movement of molecules from an area of lower concentration to an area of higher concentration, which requires energy (active transport).

Front

What is the role of ATP in Active Transport?

Back

ATP provides the energy required for active transport processes to move substances against their concentration gradient.

Front

Give an example of Active Transport.

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

Give an example of Passive Transport.

Back

An example of passive transport is the diffusion of oxygen from the lungs into the bloodstream.

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 without energy.

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.