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Chapter 5 Transport

Homeostasus and Transport

QuestionAnswer
Diffusion The movement from an area of higher concentration to an area of lower concentration
Concentration Gradient Difference in the concentration of molecules across a space
Carrier Protiens Protein that transports specific substances across a biological membrane
Contractile Vacuole Organelle in protists that expels water
Cytolysis Bursting of a cell
Equilibrium When a concentration of a substance is the same throughout a space
Facilitated Diffusion type of passive transport that allows substances to cross membranes with the assistance of special transport proteins.
Hypertonic Solution whose solute is higher than that inside a cell
Hypotonic Solution whose solute concentration is lower then that inside the cell
Ion Channel Membrane protein that provides a passageway across the cell membrane through which an ion can diffuse
Isotonic Solution whose solute concentration equals that inside a cell
Osmosis The movement of water
Passive Transport Movement of a substance across a membrane without the use of energy
Plasmolysis Shrinking of the cell wall in a hypertonic enviornment
Turgor Pressure Water pressure within a plant cell
Active Transport Movement of a substance across a cell membrane against a concentration gradient requires to use energy
Endocytosis Process by which a cell surrounds and engulfs substances
Exocytosis Process in which a vesicle inside a cell fuses with the cell membrane and releases its contents to the external enviornment
Phagocyte Cell that engages in phagocytosis
Phagocytosis Type of endocytosis in which a cell engulfs large particlesor whole cells
Pinocytosis Type od endocytosis in which a cell engulfs solutes or fluids
Sodium-potassium Pump Carrier protien that actively transports K+ ions into the cell and Na+ out of the cell
Vesicle Membrane bound sac in a eurkaryotic cell that contains materialsinvolved in endocytosis exocytosis or transport within the cell
Created by: PaullyM808
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