BIO 1140 Lecture Notes - Choline, Glycerophospholipid, Phospholipid

• School: University of Ottawa
• Department: Biology
• Course: BIO 1140
• Professor: Kathleen Gilmour

Document Summary

Presence of cell membrane, is one of key innovations to eukaryotic cells. (read text for better description of cell-cell signalling) Membrane consisted of a fluid layer (bi-layer) in to which is studded a unique complement of proteins. Lipid bi-layer is structural basis of membrane, and forms selectively permeable layer. Proteins are also freely floating within cell (mosaic of proteins) Membrane define boundaries of cell, and within cell, and form the selectively permeable layer. Membranes usefull as organization (enzymes linked to membranes for biochemical activities, like in the. Membranes also useful for controlling the movement of solutes in and out of the membrane (na+ k+ Membrane is the first point of contact between the cell and its environment. Allowing it to respond to its environment, and create a cellular response signal (cell to cell communication) In multi-cellular organism, cells need to be able to link to each other and share materials within one another.