BIOL 1F25 Lecture Notes - Lecture 22: Action Potential, Myelin, Sensory Neuron
23 Jan 2017
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Document Summary
Features to unique to neurons (as opposed to other cells): dendrites: generally information receiving areas, axons: generally information transmitting areas (generally only one axon emerge from the cell body) When neurons receive information, it is usually done by information that lands on dendrites, from other cells. The axon is responsible for the output of information. Eg: pyramidal cells of the hippocampus: location. Others are epithelial cells: interneuron - anything not a motor or sensory neuron. Interneurons comprise of the vast majority of neurons. The extent of the dendritic tree can suggest the amount of input. Brain cells use both, electrical as well as chemical impulses. Dendrites receive information from other neurons and sensory receptors. The cell body receives information from dendrites, and if enough stimulation is received, the message is passed onto the axon. Axon carries neurons message to other body cells. Myelin sheath covers the axon of some neurons to insulate and help speed the neural impulses.
