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Cell Transport

Cell Transport Flash Cards

QuestionAnswer
Substances cross the cell membrane with no energy input from the cell Passive Transport
Movement of molecules from high to low concentration Diffusion
Difference in concentration of molecules across a distance Concentration gradient
The concentration of molecules is the same throughout the space they occupy Equilibrium
Water molecules diffuse across a membrane from high to low concentration Osmosis
Concentration of solutes is lower outside of the cell. Water diffuses into the cell. Hypotonic Solution
Concentration of solutes is higher outside of the cell. Water diffuses out of the cell. Hypertonic Solution
Concentration of solutes is equal inside and outside of the cell. Water moves into and out of the cell. Isotonic Solution
Organelles that remove water Contractile vacuoles
Pressure that water molecules exert against the cell wall in plant cells. Turgor pressure
Cells shrink away from the cell wall and turgor pressure is lost. Plasmolysis
Bursting of cells Cytolysis
Movement of molecules down a concentration gradient assisted by a carrier protein Facilitated diffusion
Membrane proteins that transport ions from high to low concentration Ion channels
Movement of materials from low to high concentration Active transport
Membrane pump that transports sodium and potassium ions against their concentration gradient Sodium-Potassium Pump
Process by which cells digest external fluid, macromolecules, and large particles Endocytosis
Type of endocytosis involving transport of fluids Pinocytosis
Type of endocytosis involving transport of whole cells or large particles Phagocytosis
Process by which a substance is released from a cell through a vesicle Exocytosis
Created by: mjnepa
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