HUMB1000 Lecture Notes - Lecture 11: Axon Hillock, Endothelium, Tight Junction
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3 Aug 2018
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Structural unit of the nervous system: receives stimuli from the dendrites (short and highly branched to increase. Sa: cell body containing nucleus and other organelles, it integrates info, axons extends from the cell body. Together make the trigger zone where action potentials are generated. Axons collaterals- side branches that regulate firing patterns. Functional classification: sensory (afferent) neuron information to the cns, motor (efferent) neuron information away from the cns, inter-neuron information from one neuron to another neuron. Structural classifications: multipolar- many dendrites and single axon (majority of motor neurons cns, bipolar-2 processes=has a axon on one end and dendrites on the other, unipolar-1 process= axon from cell body that divides into t shape (sensory neurons) They have processes that come from cell body and cover the service of neurons and blood vessels. They form a supporting framework for blood vessels and neurons allowing communication.
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