Need help on biology Homework?

Theese are some problems in a packet I have gotten stuck on (its multiple choice, 1 The process of taking material into the cell by infolding the cell membrance is called 1 endocytosis 2extocytosis in 1 facilitated 2 molecular diffusion membrane proteins help molecules across the membrane The lipid bilayer discribs 1 a type of transport 2 the cell membrane Thanks in advence