BIOL 2213 Lecture Notes - Lecture 1: Lidocaine, Extracellular Fluid, Electric Potential

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Divisions of the nervous system: central nervous system (cns) think center composed of brain and spinal cord, peripheral nervous system (pns) think everything else connects cns to body"s muscles, glands, sensory organs, tissues. Axonal transport: kinesin we"re going to take something (nutrient, enzyme, etc), walk it along the axon toward the axon terminal . Moves nutrients, enzymes, other organelles: dynein opposite of kinesin moves in opposite direction (retrograde) Moves recycled vesicles, chemical signals for the cell body. Route for harmful invaders (dynein, think die not to be morbid) Classes of neurons: afferent from sensory receptors cns, efferent away from cns, interneurons connect neurons. Most numerous, all are in cns: **note** locations differ: Cell body of afferent in pns, effector cell body in cns. Groups of afferent and efferent neurons, with blood and tissue, form nerves. So, nerves are a bundle of axons!!!! (mindblown)

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