Bio Cell Membrane

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Last updated 2:26 PM on 9/16/24
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22 Terms

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Cell membrane (plasma membrane)

phospholipid bilayer that surrounds all cells and regulates what enters and leaves the cell

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Vesicle

A membrane bound sac that contains materials involved in transport of the cell.

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Homeostasis

process by which organisms maintain a relatively stable internal environment

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Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration; passive transport

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osmosis

Diffusion of WATER through a selectively permeable membrane; passive transport

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facilitated diffusion

Movement of specific molecules from high to low concentration across cell membranes through protein channels; passive

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active transport

the movement of materials through a cell membrane using energy; movement from low to high concentration

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concentration gradient

difference in the concentration of a substance from one location to another

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passive transport

Requires NO energy Movement of molecules from high to low concentration,Moves with the concentration gradient

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semipermeable (selectively permeable) membrane

allows the passage of some particles while blocking the passage of others

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Endocytosis

process by which a cell takes material into the cell by infolding of the cell membrane

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Phagocytosis

A type of endocytosis in which a cell engulfs large particles or whole cells; cellular eating

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Pinocytosis

A type of endocytosis in which the cell ingests extracellular fluid and its dissolved solutes; cellular drinkning

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Exocytosis

Process by which a cell releases large amounts of material

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Isotonic

when the concentration of two solutions is the same

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Hypotonic

when comparing two solutions,the solution with the lesser concentration of solutes; OR the solution with more water

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Hypertonic

when comparing two solutions,the solution with the greater concentration of solutes; OR the solution with less water

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Solute

Substance being dissolved

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Solvent

A liquid substance capable of dissolving other substances

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Solution

A mixture that forms when one substance dissolves another.

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Hydrophilic

Attracted to water

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Hydrophobic

Having an aversion to water; tending to coalesce and form droplets in water.