Active & Passive Transport

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy input, usually in the form of ATP.

Front

What is passive transport?

Back

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

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 endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment by vesicles fusing with the cell membrane.

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What is phagocytosis?

Back

Phagocytosis is a type of endocytosis where a cell engulfs large particles or microorganisms, often for the purpose of destroying them.

Front

What is pinocytosis?

Back

Pinocytosis is a type of endocytosis where a cell engulfs small particles or liquids, often referred to as 'cell drinking'.

Front

What is a concentration gradient?

Back

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

Front

What is the role of ATP in active transport?

Back

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

Front

What is facilitated diffusion?

Back

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