ES 342 Study Guide - Midterm Guide: Axon Hillock, Neuroglia, Axon Terminal

• School: University at Buffalo
• Department: Exercise Science
• Course: ES 342
• Professor: Wilson

Document Summary

Introduction: 100 billion neurons, 10,000 different neurons in the brain, motor neurons = muscle cells. The nervous system has two different cases of cells: nerve cell = neurons -> excitable cells for communication, glial cells = glia or neura glia -> support cells -> non-excitable. Allow for the nervous system to function better: neurons muscle cells and neurons are the only excitable cells in the body. Ter min al regi on of inc omi ng axo n. *cell body is located in ventral horn in spinal cord. Axon hillock is the trigger zone that generates the action potential. Schwan cell -> support cell in the pns. A typical neuron has 4 morphologically defined regions: cell body metabolic cell. Body only represents 10% of a cells total volume: dendrite receptive portion. Longer axons are up to 1 meter long: presynaptic terminal. Ramon y cajal neurobiologist responsible for: neuron doctrine, principle of dynamic polarization.