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Anatomy: N. Tissue

Lecture 13: Nervous Tissue

Dendrites Processes that carry electrical activity TOWARD the cell body do not carry impulses (action potentials) conduct a graded potential Electrical disturbances at root of axon (ideal) if large, may trigger axon to fire an impulse
Axon Carries an impulse (action potential) AWAY from cell body
Neurons classified structurally by # of processes multipolar: vast majority 2+ processes, mean. many dendrites, one axon most interneurons and motor neurons Unipolar: only in sensory neurons
Unipolar relating to Sensory neuron divides into branches 1. Peripheral Process 2. Central Process
Why are sensory neurons sometimes called pseudo-unipolar neurons? In embryo stage, the sensory neuron branches (processes) are actually 2 separate branches, but are fused into one.
Why can unipolar sensory neurons be both axons and dendrites 1. Peripheral Process: Send information toward cell body like dendrite BUT also conducts an impulse like an axon. In end, call it an axon
Created by: madhatter