BIOL 1001 Chapter : BIOL TEST 2 Ch Review
Document Summary
The cell membrane is usually the outermost barrier of the cell: an exception to this is found in cells which have a cell wall, plants- cellulose, fungi- chitin, bacteria- chitin plus proteins. The cell wall is mainly for structural support & protections. Usually doesn"t act as a barrier to molecules. The plasma membrane- contains the cell but still allows the cell to interact with the environment. Regulate exchange between inside and outside: 3. Cell identification: membrane proteins provide a fingerprint" for the cell type, hiv binds to cell receptors that are present on cells inside the body, but not present on skin cells. Called cd receptors (cluster of differentiation): this is why it is unlikely that you will contract hiv through casual contact. Plasma membrane- the membrane at the boundary of every cell that acts as a selective barrier, thereby regulating the cell"s chemical environment: 1. Membranes are made primarily of lipids: 2.
