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vocab 4

unit 1 vocab 4 test

cell membrane protects the cell and regulates what enters and leaves the cell
polar phosphate head that faces the outsides and insides of cell, freely interacting with water
non-polar fatty acid tails, attached to phosphate head that remain facing the inside of the cell membrane, avoiding water in and out of the cell
hydrophobic scared of water
hydrophilic water loving
fluid mosaic flexible lipid bi-layer with proteins embedded
simple diffusion small molecules like oxygen, water, and carbon dioxide can move thru the lipid bi-layer fro high to low concentration
facilitated diffusion molecules that travel from high to low, thru channel protein
semi-permeable lets SOME things pass through
equilibrium concentration is the same throughout the system
active transport uses ATP energy to move molecules across the membrane
passive transport does not require energy to move molecules across the membrane
channel protein protein that allows certain molecules to pass in and out of cell, from high to low concentration
protein pump protein that allows specific molecules in and out cell, from low to high concentration, uses ATP
Created by: flores.angela