Receptor Protein :: essays research papers

Receptor Protein Protein that binds to a particular(prenominal) single molecule, enabling the cell to react to the signal molecule. i.e. The muscles of a person exercising can not constrict without receptor proteins and signal molecules that tell the muscles when to contract and when to relax.Second Messenger level molecule produced in response to the bind of a chemical substance signal. Acts as a signal molecule in the cytoplasm.Signal Molecule Carries data throughout the body and to other cells.Ion Channel 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 unified 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 s messengers inside the cell3.Activating the enzymes inside the cell1. Changes in permeablenessAn Ion Channel may be coupled with the receptor protein, is in general anatomy 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 move enzymes, triggering a series of biochemical reactions in the cell.