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