Cell Transport

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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 various mechanisms such as diffusion, osmosis, and active transport.

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What is diffusion?

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Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

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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, relying on concentration gradients.

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What is active transport?

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Active transport is the process of moving substances across a cell membrane against their concentration gradient, requiring energy (usually in the form of ATP).

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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 lower solute concentration to an area of higher 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 exocytosis?

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Exocytosis is the process by which a cell expels large quantities of materials, such as waste or toxins, by vesicles fusing 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 materials by engulfing them in a vesicle formed from the cell membrane.

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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 across a space, which drives the movement of molecules during diffusion.

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What is simple diffusion?

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Simple diffusion is the movement of small or nonpolar molecules directly through the phospholipid bilayer of the cell membrane without the assistance of proteins.