PSYCH 330 Lecture Notes - Sodium Channel, Semipermeable Membrane, Reference Electrode
26 Sep 2013
School
Department
Course
Professor
Document Summary
>> neural electrical impulse- changes in the relative charge of the inside the cell versus the outside of the cell. By changing the distribution of ions along the membrane. An ion is an electrically charged atom or molecule. > sometimes have unequal number of protons and electrons. > anion vs. cation defends on chemical properties of atom. Electrical currents in neuronal membranes are caused by the movement of electrically charged atoms (ion) in and out of the cell - through ion channels. > ion channels are made of proteins that span the membrane (transmembrane proteins) have an opening that allows ions to flow through them. > some neurotransmitters bind to receptor sites on the outside surface of ion channels and cause them to open or close. > unequal distribution of charges, more anions inside the cell and more cations outside of the cell. > reference electrode - outside of the cell. > oscilloscope - lets us visualize the cell.
