Transport System Test Flashcards
hypertonic
lower water than cytosol, hypertonic - out shrink
hypotonic
more water than cytosol, hypotic, in, swells
isotonic
water same, in out same
where water flows, what happens to cells?
cells must compensate to remain alive, water enters and hypo and leave hyper
endocytosis
in membrane pinches vesicle
exocytosis
out vesicle fuses kicks to external environment
endocytosis vs. exocytosis
?
pinocytosis
vesicle contains solute fluid (see endocytosis/exocytosis)
phagocytosis
large particle or cells (see endocytosis/exocytosis)
pinocytosis vs. phagocytosis
?
pass and active transport
movement of molecules across cell membrane without energy input by the cell is PASSIVE
movement of molecules across cell membranes with energy input from cell is ACTIVE
diffusion
movement of molecules, area of high concentration to low, driven by molecules kinetic energy until equilibrium is reached; diffusion across membranes molecules can diffuse across a cell membrane two ways
osmosis
passive; diffusion of water across a membrane, NET direction determined by the relative solute concentration on two sides of the membrane high to low
facilitated diffusion
?
ion channels
passive, proteins or groups of proteinsl provide small passageway specific to ION
