movement of molecules from high to low concentration
diffusion
let everything in and out
permeable
let nothing in or out
impermeable
movement of water
osmosis
animal cells are enclosed by a
membrane
makes sure the fluid that surrounds our cells has a stable concentration
kidneys
transport that requires energy
active
solution has a greater concentration of molecules
hypertonic
type of transport that does not require energy
passive
a molecule composed of two hydrogen and one oxygen
water
a solution that has equal amounts of particles
isotonic
when a solution has greater concentration of particles
hypotonic