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Cell Transport
(cell membrane) Seminole county Florida Biology
Term | Definition |
---|---|
plasma membrane | thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell |
phospholipids | form the lipid bilayer in cell membranes where their hydrophobic tails face inward while their hydrophilic polar heads face outward |
isotonic | when the concentration of two solutions is the same |
osmosis | diffusion of water through a selectively permeable membrane |
dynamic equilibrium | a steady state |
active transport | movement from an area of lower concentration to an area of higher concentration, requires energy, and a carrier protein? |
concentration gradient | change in the concentration of solutes in a solution as a function of distance through a solution |
facilitated diffusion | molecules pass across the membrane through channels |
hypertonic | the solution with the greater concentration of solutes |
hypotonic | the solution with the lesser concentration of solutes |
semipermeable (selectively permeable) | allows some substances to pass across while others can't |
bilayer | double layer (2) |
diffusion | particles move from an area of high concentration to an area of low concentration |