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Biology

Chapter 5 Test

QuestionAnswer
Kinetic Molecular Theory Molescules in constant random motion; factors that affect that motion Pressure, Agitation, Concentration, Temperature
diffusion movement of molecules from high concentrations to low concentration
passive transport cell needs to maintain a constant stable environment
Cell membrane selectively permeable; only allows some things to pass through
small molecules sugar, water, co2, o2
osmosis movement of water from areas of high concentration to areas of low concentration
isotonic amount of water and particles is the same in the cell and the environment
hypotonic amount of water is greater outside cell so water rushes into the cell and it bursts
cytolosis bursting of a cell
hypertonic the amount of water is less outside the cell so water rushes out of the cell and the cell shrinks
plasmolysis shrinking of a cell
ion channels a transport protein with a polar pore through which charged particles (ions) can pass
facilitated diffusion uses carrier proteins to transport subtances moleculs that want to enter bind to the carrier protein. The protein changes its shape to transport substance across the membrane then releases it
active transport the movement of a substance across a cell membrane from against the concentration gradient (low-concentration to high concentration)
vesicle membrane-bound organelle
concentration gradient concentration difference across space
phagocytosis uptake of large particles
pinocytosis uptake of solutes or fluids
All forms of passive transport depend on the kinetic energy of molecules
three types of passive transport diffusion, osmosis, facilitated diffusion,
endocytosis brings into cells
exocytosis releases it out of the cell
sodium potassium pump transports potassium ions into the cell
isotonic solution should have no affect on a cell
carrier protein shields molecule from interior of lipid bilayer
phospholipids double layer that makes up cell membrane
in cell membrane, ion channels serve as passageways
Created by: asc1892
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