BIO 2600 Study Guide - Membrane Transport, Lipid Bilayer, Cell Membrane
Document Summary
Plasma membrane is involved in cell communications, import/export of molecules and cell growth: receptor proteins in the plasma membrane act as sensors that enable the cell to receive information about changed in its environment and respond to them. If a cell is to survive and grow nutrients must pass inward across the plasma membrane and waste products must pass out. Highly selective channels and transporters allow specific substances to be imported and others to be exported: the flexibility of the membrane and its capacity for expansion allows cell growth and movement. Cell membranes contain specialized membrane transport molecules that facilitate the passage of. Liposome: cell membranes are permeable to many water-soluble molecules through specialized membrane proteins. The rate at which a molecule crosses a protein-free artificial lipid bilayer by simple diffusion. The difference in ion composition between a cell"s interior and its.
