Cell transport Flashcards
Give two ways in which active transport is different from facilitated diffusion.
Uses energy / ATPAgainst concentration gradient / low to high concentrationDoes not use channel proteins / only uses carrier proteins;
Some substances can cross the cell-surface membrane of a cell by simple diffusion through the phospholipid bilayer.Describe other ways by which substances cross this membrane
By osmosis (no mark)1. From a high water potential to a low water potential/down a water potential gradient2. Through aquaporins/water channelsBy facilitated diffusion (no mark)3. Channel/carrier protein4. Down concentration gradientBy active transport (no mark)5. Carrier protein/protein pumps6. Against concentration gradient7. Using ATP/energy (from respiration)By phagocytosis/endocytosis (no mark)8. Engulfing by cell surface membrane to form vesicle/vacuoleBy exocytosis/role of Golgi vesicles (no mark)9. Fusion of vesicle with cell surface membrane
