BIOSC-101 Lecture Notes - Lecture 24: Neuroglia, Myelin, Action Potential
9 Sep 2020
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Carry information to the cell body of a neuron. Carries information away from cell body to either another neuron or an. Consists of parallel axons, dendrites, or both from many neurons. Classified as sensory, motor, or mixed (sensory and motor together) depending on the type of neurons they contain. Found on most axons outside the cns and some of those within the cns. Provides electrical insulation that increases the rate of the conduction of a nerve impulse. Composed of the plasma membranes of glial cells. Describe what a nerve is and its features. A nerve impulse, or action potential, is an electrochemical signal that involves sodium & potassium ions (na+ & k+) that crosses the cell membrane through ion channels. Each ion channel is designed to allow only certain ions to pass through. Ion channels may be permanently open or regulated by a gate. A protein that changes shapes and opens/closes a channel.
