Receptor Protein :: essays research papers

sensory receptor Protein Protein that binds to a precise sensation molecule, enabling the cell to respond to the sharpen molecule. i.e. The muscles of a person usage can not ask without receptor proteins and signal molecules that tell the muscles when to contract and when to relax.Second Messenger Signal molecule produced in response to the fecundation of a chemical signal. Acts as a signal molecule in the cytoplasm.Signal Molecule Carries information throughout the body and to other cells.Ion short letter A large protein in the cell membrane that transports a specific ion.Enzyme Action Speeds up chemical reactions in the cellBeta blocker A drug that interferes with the binding of signal molecules to receptor proteins and heart muscles.Changes in permeability Occur when a receptor protein is coupled with an ion channel.Functions of receptor proteinsThe signal molecule binds to the receptor protein thats specialized to fit the molecule.Binding of a signal molecule to the matching receptor protein causes a change in the activity of the receiving cell in three ways1.Changes in permeability of receiving cell2.Triggering the formation of second couriers at bottom the cell3.Activating the enzymes internal the cell1. Changes in PermeabilityAn Ion Channel may be coupled with the receptor protein, is in Figure 4-8 on Pg. 84. The binding of the second messenger and the receptor protein causes the Ion Channel to open. This allows specific ions to cross the cell membrane. 2. Second MessengersReceptor protein can cause a second messenger to form inside of the cell. Some second messengers activate enzymes, triggering a series of biochemical reactions in the cell.