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neurons (structural classifications of neurons (ABUM) (anaxonic neurons…
neurons
components
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axon (efferent, sometimes afferent)
structure: single long process ending at synapses, initial segment, axon hillock, axolemma (PM), mitochondria, microtubules, neurofilaments
function: bi-direction transportation, kinesin: anterograde transportation, dynein: retrograde transportation
axoplasm: continuation of cytoplasm of cell body (low Na, high K)
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three types of neurons
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interneurons: a neuron that transmits impulses between other neurons, especially as part of a reflex arc
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synapse
synaptic cleft: extracellular gap that separates the pre-synaptic membrane from the post-synaptic membrane (high Na, low K)