Cell transport

Front

What is Active Transport?

Back

Active Transport is the movement of solutes against the concentration gradient, requiring energy (ATP).

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What is Passive Transport?

Back

Passive Transport is the movement of substances across a cell membrane without the need for energy, following the concentration gradient.

Front

What is Osmosis?

Back

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

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What is Endocytosis?

Back

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

Front

What is Exocytosis?

Back

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

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What is Facilitated Diffusion?

Back

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

Front

What is Simple Diffusion?

Back

Simple Diffusion is the movement of small or nonpolar molecules across the cell membrane without the assistance of proteins.

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What role does ATP play in Active Transport?

Back

ATP provides the energy required for Active Transport to move substances against their concentration gradient.

Front

What is a Concentration Gradient?

Back

A Concentration Gradient is the difference in the concentration of a substance across a space or membrane.

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What is a Selectively Permeable Membrane?

Back

A Selectively Permeable Membrane allows certain molecules or ions to pass through it while blocking others.