What is receptor mediated endocytosis?

Answer 1

This is a field so interesting!

endocytosis is the way cells aquire molecules from the outside, and they do get those molecules using receptors, mostly proteins imbeded into the cell membrane, this receptor identifies, catches and starts intake of 1 kind of molecules, there are as many receptors as molecular types cells get from the out side.

An importan example are GLUTS or glucose transporters, http://www.4adi.com/flr/glutsflr.html is a start page on them, try also mediagraphic.com-pdfs-archi
these pages are so clear on such a function!, good luck!

Answer 2

In basic terms... anything receptor mediated depends on 2 things. The germ presenting a protein and the target cell having the receptor specific to the protein presented by the germ.

In receptor-mediated endocytosis, a specific receptor on the cell surface binds tightly to the extracellular macromolecule (the ligand) that it recognizes; the plasma-membrane region containing the receptor-ligand complex then undergoes endocytosis, becoming a transport vesicle.