Biology Cellular TrAnsport Study Guide

osmosis
the diffusion of water from high to low across a semi permeable membrane
cholesterol
acts as a rebar and stabilizes plasma membrane
carrier protein
opens and closes to allow certain BIG molecules in and out of the cell
passive transport
materials move in and out of the cell with no energy use
channel protein
hollow tube like structure that allows for transport of materials
facilitated diffusion
proteins helping with no energy powered by the concentration gradiens
active transport
against concentration gradient energy requires
hyperinic solution
concentration of solutes is more outside the cell than inside the cell
homeostasis
the plasma membrane maintains this in the cell
concentration gradient
main component that controls osmosis
hypotonic solution
concentration of solutes is less outside the cell than inside
phospholipid bilayer
another name for plasma membrane
isotonic solution
concentrations of solution and cell are equal
shrivel
hypertonic solution causes cells to do this
mitochondria
this is where cells get their energy from
normal
cells in isotonic solutions are said to be
swell
cells in hypotonic solutions will usually
energy
active transport requires
high to low
concentration gradient usually goes from