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Biol Exam 2 Study P3

QuestionAnswer
temperature can change fluidity or viscosity
warm temperature and mostly unsaturated fatty acids fluid membrane
cool temperature and mostly saturated fatty acids viscous (less fluid) membrane
fluid structure containing many components -phospholipids -cholesterol -proteins fluid mosaic model
carbohydrate attached to a protein glycoprotein
carbohydrate attached to a lipid glycolipid
-no energy input -substances move from high to low concentrations -along a concentration gradient -simple diffusion and facilitated diffusion passive transport
-energy (atp) required -substances move from low to high concentrations -goes against concentration gradient active transport
simple diffusion, channel facilitated diffusion, carrier facilitated diffusion, osmosis 4 types of passive transport
small gases and lipids diffuse along their concentration gradient (through phospholipid bilayer) (oxygen from blood to tissue, co2 from tissue to blood) simple diffusion
ions diffuse along their concentration gradient (via channel proteins or carrier proteins) -channels are selective -Ex: k+ ions, na+ ions channel facilitated diffusion
large molecules to diffuse along their concentration gradient (ex: glucose) carrier facilitated diffusion
water diffuses along concentration gradient osmosis
solutions share equal solute concentrations isotonic
on the outside (dilute solids outside) has a lower solute concentration (cells take up water, swell and bursts) *animal cell* hypotonic
on the outside (concentrated solutes outside) has a higher solute concentration (cell loses water and shrivel) *animal cell* hypertonic
cell stiffens, retain shape bc cell wall is present (plant cell) hypotonic
cell shrinks pulling cell membrane from cell wall, plasmolysis (plant cell) hypertonic
Created by: vinaluu45
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