Describe the roll of each of the following in membrane transport a.)facilities diffusion b.)osmosis c.)active transport d.)endocytosis e.)exocytosis Solution a) Facilitated diffusion is the process of spontaneous passive passage of molecules or ions across a cell\'s membrane passing through specific transmembrane integral proteins. Its role: b) Osmosis is the net movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.In other word it is the diffusion of water down the water potential gradient. It’s role: c) active transport: d) and e) Exocytosis and endocytosis:Endocytosis and exocytosis are both forms of bulk transport that move materials into and out of cells, respectively, via vesicles. not by membrane transport..

1. Describe the roll of each of the following in membrane transport
a.)facilities diffusion
b.)osmosis
c.)active transport
d.)endocytosis
e.)exocytosis
Solution
a)
Facilitated diffusion is the process of spontaneous passive passage of molecules or ions across a
cell's membrane passing through specific transmembrane integral proteins. Its role:
b) Osmosis is the net movement of water across a semipermeable membrane from an area of
lower solute concentration to an area of higher solute concentration.In other word it is the
diffusion of water down the water potential gradient. It’s role:
c) active transport:
d) and e) Exocytosis and endocytosis:Endocytosis and exocytosis are both forms of bulk
transport that move materials into and out of cells, respectively, via vesicles. not by membrane
transport.