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Plasma M and Cell T

QuestionAnswer
Plasma Membrane Fexible boundary, separates cell from surroundings, keeps a healthy balance within cell (homeostasis)
Selective permeability plasma membrane allows some substances to enter others are kept out
Plasma membranes are made up of.. phospholipid molecule
phospholipid molecule head-phosphate portion (polar) tail- two fatty acid tails (nonpolar)
phospholipid molecules are arranged in a __________ with the polar heads facing _________ bilayer, outward
Other __________ also float with the phospholipids molecules
other molecules with phospholipids proteins, cholestorol, carbohydrates
Diffusion movement of substances from an area of high concentration to an area of low concentration 02, C02, water
Concentration gradient difference in concentration of a substance between two regions
from hig-to-low concentration with the concentration gradient, spontaneous
from low to high concentration against the concentration gradient, requires an input of energy
Osmosis diffusion of water: movement of water froma high concentration to low concentration across a semipermeable membrane
how does osmosis affect cells? cells float in a ______ solution _______ isotonic solution water moves ____________ at same rate cells keep their ______ shape water, isotonic, in and out, normal
isotonic solution a solution in which dissolved solutes inside and outside the cell have the same concentration
hypotonic solution when the concentration of solutes is lower outside cell than inside
hypertonic solution concentration of solutes outside the cell is higher than inside the3 cell
Created by: AlanaR
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