Cell Transport

Front

What is diffusion?

Back

Diffusion is the process by which small molecules move from an area of high concentration to an area of low concentration across a cell membrane.

Front

What is passive transport?

Back

Passive transport is the movement of particles from high to low concentration without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of molecules from low to high concentration, requiring energy (ATP) to occur.

Front

What is the main difference between active and passive transport?

Back

Active transport uses ATP (energy) to move substances against their concentration gradient, while passive transport does not require energy.

Front

Which type of transport requires energy input?

Back

Active transport requires an input of energy.

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 facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either passively or actively.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in concentration of a substance across a space, which drives diffusion.

Front

What is the significance of ATP in active transport?

Back

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