the membrane transport

the fluid mosaic is a membrane model proposed by singer and nicolson in 1972 that an interaction of 3 classes of proteins :

integral proteins:in the middle of the membranes

glycoproteins:crosses the membrane.

peripheral proteins:aside from the membrane.

the function of the cell membrane:

is a laminar structure wich comprises the cell , defines its boundaries and helps maintain the balance between internal and outside of these. in adittion similar to the membranes that delimit the organelles of eukariotics cells.

MEMBRANE TRANSPORT.

is callest the set of mechanisms that regulate the passage of solutes such as ions and smalls molecules across cell membranes.