Lectures Tagged with: غشاء الخلية
Synthesis And Sidedness Of Membranes
Synthesis and sidedness of membranes • Membranes have distinct inside and outside faces • When a vesicle fusses with the plasma membrane the outside layer of the vesicle becomes continuous with the cytoplasmic layer of the plasma membrane
Membrane Structure And Function
Membranes consist largely of a lipid bilayer, which is a double layer of phospholipid, cholesterol, and glycolipid molecules that contains chains of fatty acids and determines whether a membrane is formed into long flat sheets or round vesicles. Lipids give cell membranes a fluid character, with a consistency approaching that of a light oil. The fatty-acid chains allow many small, fat-soluble molecules, such as oxygen, to permeate the membrane, but they repel large, water-soluble molecules, such as sugar, and electrically charged ions, such as calcium