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Cell Boundaries

TermDefinition
Cell Membrane Regulates what enters and leaves the cell. (especially water)
Active Transport Where materials are moved in the opposite direction "against a concentration difference".
Lipid Bilayer Makes up the "double-layered" composition of the cell membrane.
Equilibrium Is when the concentration of the "solute" is the same throughout a solution.
Phagocytosis Where the cell takes in a SOLID from the surrounding environment (cell eating).
Hypertonic Is when two solutions on both sides of a membrane are COMPARED and one has a "HIGHER" solute particle # or (strength) than the other one it is compared to.
Hypotonic Is when two solutions on both sides of a membrane are COMPARED and one has a "LOWER" solute particle # or (strength) than the other one it is compared to.
Solvent Is the substance that the solute is "DISSOLVED BY" to form a solution.
Solution A MIXTURE of two or more substances where the molecules are evenly distributed. (solvent + solute).
Diffusion Is when particles move from an area where they are MORE concentrated to an area where they are LESS concentrated.
Isotonic Is when two solutions on both sides of a membrane are compared and have the "same solute strength".
Concentration Is the mass of a solute in a given volume of solution (g/L).
Facilitated Diffusion When cell membrane "channels" HELP molecules across the cell membrane.
Solute Is the substance waiting to be dissolved by water to form a solution (ex. sugar, salt..)
Cell Wall Made of fibers of carbohydrates and protein. Provides protection for plant cells.
Pinocytosis Where the cell takes in a LIQUID from the surrounding environment (cell drinking).
Osmosis Is the diffusion of "WATER" through a selectively permeable membrane from a higher concentration to a lower one.
Phospholipid Molecules Makes up the cell membrane. The head "phospho-" part of the molecule loves water (hydrophilic). The tail "-lipid" part of the molecule hates water (hydrophobic).
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