Cell Transport

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What is Active Transport?

Back

Active transport is the movement of substances across a cell membrane that requires energy, usually in the form of ATP, to move substances against their concentration gradient.

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What is Selective Permeability?

Back

Selective permeability is the ability of the cell membrane to allow some substances to pass through while preventing others.

Front

What is Passive Transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy, moving substances down their concentration gradient.

Front

What is Osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

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What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during transport.

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What is the role of ATP in Active Transport?

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

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What is an example of Passive Transport?

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An example of passive transport is the diffusion of oxygen and carbon dioxide across the cell membrane.

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What happens during Osmosis?

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During osmosis, water moves from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration).

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What is facilitated diffusion?

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

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What is a transport protein?

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Transport proteins are proteins that assist in the movement of substances across a cell membrane.