Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as passive and active transport.

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What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

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What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

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What is endocytosis?

Back

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

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What is exocytosis?

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Exocytosis is the process by which cells expel substances by vesicles fusing with the cell membrane and releasing their contents outside the cell.

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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 molecules from areas of high concentration to areas of low concentration.

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What role does ATP play in active transport?

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

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What is osmosis?

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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.

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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 are transport proteins?

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Transport proteins are proteins that assist in the movement of substances across the cell membrane, either by facilitating passive transport or by actively transporting molecules.