KINE 2011 Chapter Notes - Chapter 3: Lipid Bilayer, Cell Adhesion Molecule, Cell Adhesion
29 Mar 2014
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Chapter 3 the plasma membrane & membrane potential. Plasma membrane: is an extremely thin layer of lipids and proteins that forms the outer boundary of every cell and encloses the intracellular contents. ( it maintains the fluid composition inside and outside of the cell) Controls the entry of nutrients of molecules and the exit of secretory and waste products. It also maintains differences in ion concentrations between the cell"s interior and exterior. Also participates in joining of cells to form tissues and organs. Also plays a key role in the ability of a cell to respond to changes or signals in the cells environment. For every cell these membrane functions are important: (1). The cells" ability to function cooperatively and in coordination with surrounding cells. Appears to be trilaminar structure in electron microscope with two dark layers separated by a light middle layer. Consists of mostly lipids (fats), proteins and some carbs.
