cell membrane Flashcards
what is diffusion
particles move from an area of greater condensation to lower
what is concentration gradient
diffusing molecules between 2 regions
what can affect the rate of diffusion
size of molecule, shape, temp,ion, concentration gradient
what is osmosis
diffusion of water from greater concentration to lower
what is a solvent
the dissolver/ mixer ie water
what is a solute
particles that are dissolving ie sugar in water
what is osmotic pressure
the pressure due to the flow of water
what is hydrostatic pressure
pressure exerted by liquids
what makes facilitated transport different from the other
uses a carrier
what is facilitated transport
passage of molecules (glucose,amino acids) from a greater concentration to a lower
what is passive transport
no energy is needed ie diffusion and osmosis
what is active transport
molecules crossing the cell membrane from less concentration to higher with a carrier and energy
what makes active transport different
uses carrier and energy
where does active transport occur
in the nerves and muscle cells
Na + K pump
where does facilitates transport occur
i. all body cells
