Nervous System, Drawing

Nervous System, Drawing

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Credit: Jacopin/BSIP/SCIENCE PHOTO LIBRARY

Caption: Illustration of the central nervous system, from the brain to the synapse. Top right is the brain seen in profile, then a close-up of the neuronal system. A neuron and its axon are visible around which oligodendrocytes (small pinkish purple cells) form an insulating sheath allowing a faster electrical signal from one neuron to another. Finally, an illustration of the transmission of a nervous impulse between two neurons. Vesicles release glutamate (orange balls) that fix onto receptors (purple) that open sodium channels allowing Na+ ions to penetrate the B neuron's terminal dendrite buttons, creating an electrical current.

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Keywords: anatomy, artwork, axon, brain, cell body, central nervous system, cerebral cortex, chemical synapse, connection, dendrite, exocytosis, glutamate, human, ion channels, male, man, medicine, membrane receptor, myelin sheath, nerve impulse, nervous system, neuroglia, neurology, neuron, neurotransmitter, normal, oligodendrocyte, oligodendroglia, receptor, silhouette, synapse, synaptic cleft, synaptic vesicle, transmission, vesicle

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