43. The difference between pinocytosis and receptor-mediated endocytosis is that .
(A) pinocytosis brings only water molecules into the cell, but receptor-mediated endocytosis brings in other molecules aswell
(B) pinocytosis increases the surface area of the plasma membrane whereas receptor-mediated endocytosis decreases theplasma membrane surface area
(C) pinocytosis requires cellular energy, but receptor-mediated endocytosis does not
(D) pinocytosis is nonselective in the molecules it brings into the cell, whereas receptor-mediated endocytosis offersmore selectivity
(E) pinocytosis can concentrate substances from the extracellular fluid, but receptor-mediated endocytosis cannot第 5 頁，共 9 頁