Cell Transport Amoeba sisters

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What is cell transport?

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

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What is passive transport?

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

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What is active transport?

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

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What is diffusion?

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Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration.

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What is osmosis?

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Osmosis is the diffusion of water molecules across a selectively permeable membrane.

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What is exocytosis?

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Exocytosis is the process by which a cell expels large molecules or particles by enclosing them in a vesicle that fuses with the cell membrane.

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What is endocytosis?

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Endocytosis is the process by which a cell takes in large molecules or particles by engulfing them in a vesicle.

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What is a concentration gradient?

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A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules.

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What is a selectively permeable membrane?

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A selectively permeable membrane allows certain substances to pass through while blocking others, maintaining the internal environment of the cell.

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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.