Pinocytosis of small vesicles (around 100 nm in diameter). Not blocked by cytochalasins. ... (18 Nov 1997) ... 
(mi″kro-pin″o-si-to´sis) the taking up into a cell of specific macromolecules by invagination of the plasma membrane, which is then pinched off, resulting in small vesicles in the cytoplasm.
Pinocytosis of small vesicles (around 100nm in diameter). Not blocked by cytochalasins.