Chapter 7.3 Flashcards
diffusion of substance with no energy
passive transport
moving particles so they spread out evenly into the space
diffusion
what happends to molecules at diffusion equilibrium
molecules cross membrane at equal rate
move based on the concentration gradient
diffusion
a type of passive transport becuase it requires no energy
diffusion
the diffusion of free water across the membrane
osmosis
water continues until what is equal in osmosis
til concentration is equal
a surrounding solution that causes a cell to gain/lose water
tonicity
depends the concentration of the solutes in the solution that can’t cross the membrane
tonicity
high concentration solution
low concentration solute in cell
what does the water do?
leave the cell
when water leaves the cell
hypertonic
low concentration solution
high concentration solute in cell
what does the water do?
enter the cell
when water enters the cell
hypotonic
equal concentration outside and inside the cell
isotonic
water diffuses at the same rate in both directions
isotonic
control of the solute concentration and water balance
osmoregulation
most healthy state of the cell
turgid
isotonic solution where the plant limps
flaccid
plant loses water in hypertonic environment
plasmolysis
cell shrinks and pulls away from the cell wall
plasmolysis
facilitate the transport of ions
ion channels
type of ion channel that opens/closes based on a stimulus
gated channel
undergos a shape change to move through the membrane
carrier proteins
no energy is rquired for these type of proteins
carrier proteins
