passive and active transport Flashcards
passive transport
does not required expenditure of energy by the cell simple diffusion osmosis facilitated diffusion bulk flow( filtration)
simple diffusion
goes right through the cell (flows form an area of high conc. to an area of low concentration
osmosis
water follows salt-
isotonic
both salt and water are at equal amounts
hypotonic
to little salt and too much water moves into cell causing it to hemolyzed and burst.
hypertonic
too much salt compare to solvent (water) this causes the cell to move water out of the cell and it shrinks (crenated)
facilitated diffusion
ion and protein channel along the membrane
filtration( bulk flow )
requires a difference in pressure ( hydrostatic pressure in blood vessels )
active transport
the usage of energy from the splitting of ATP. moving molecules across cell membrane against conc gradient
Membrane pumps
primary and secondary
primary
hydrolyses from ATP
changes the shape of transport of media
(sodium/pump ion channel )
secondary
uses potential energy in an ionic conc.
Antiporter - move Ca+ out of the cell
Symporter- moves substances in like glucose
Endocytosis
moves stuff into the cell by vesicles many types of endocytosis.
phagocytosis
endocytosis of large particles- cell eating
pinocytosis
endocytosis of ECF tha contains dissolved solutes (cell drinking)