BISC306 Chapter Notes - Chapter 8: Resting Potential, Myelin, Reference Electrode

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC306
• Professor: michael moore

Document Summary

Chapter 8 - part 2: action potential; neurons: cellular and network properties. Movement of a charge in a nerve cell. Consists of two types of voltage changes: No weak or strong, you either have an action potential oe you don"t. Does not decrease in strength with transmission distance. No entropy, no resistance, measurement is identical at beginning as it is at the end. Unlimited in how far they can travel. Nerve impulses is a change in the membrane potential (voltage) Three types of changes from a start of -70mv. Reference electrode is given a value of 0 mv and stays at 0 mv. Action potential occur in the axon of a neuron. Wave of electrical signal at constant amplitude. Makes nerve cells and muscle cells differ. Allows ions to move through the membrane. Channels open and close based of voltage change. Affect the permeability of the membrane to ions. Cause ion currents across the membrane changing the cells voltage.