BIOL 382 Lecture Notes - Lecture 8: Fluid Compartments, Extracellular Fluid, Protein Isoform
Document Summary
How does the presence of ca2+ channels affect. 18 genes encode for k+ vgc in all animal species. 11 isoforms in mammals with minor functional differences. Some have a lower threshold for ap generation and some have a shorter relative refractory period. Open at the same time or instead of na+ Depolarization is slower and more sustained than na+ generated depolarization. Slower maximal frequency of aps due to longer refractory period. Ca2+ vgc channels play key role in function of cardiac muscles. The properties of an axon that dictate current flow along the axon are called cable properties: Current (amount of charge moving past a point at a given time) Voltage (drop in voltage across the circuit) Resistance (force opposing flow of electrical currents) Ions moving through vgc cause current across membrane. Some current leaks out of axons and flows backwards along outside of ion, completing the circuit: ecf, membrane.
