Key Terms in Biology

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Homeostasis

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The ability of an organism or environment to maintain stability despite changes.

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Diffusion

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The movement of particles from an area of high concentration to an area of low concentration.

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Facilitated diffusion

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The process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins.

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Acuaporina

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A protein in cell membranes that facilitates the transport of water between cells.

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Soluto

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A substance that dissolves in a solvent to form a solution.

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Solvent

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A substance that dissolves a solute, resulting in a solution.

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Ósmosis

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The movement of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

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Isotonic

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A solution that has the same solute concentration as another solution.

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Hipertónico

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A solution that has a higher solute concentration than another solution.

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Hypotonic

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A solution that has a lower solute concentration than another solution.