BIOL 1082 Chapter Notes - Chapter 43.1-43.2: Membrane Potential, Oligodendrocyte, Neuroglia

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Distinguish between the subdivisions of the nervous system, and the different types of neurons, central nervous system cns is the command center. Sensory neurons - carry impulses from sensory receptor to cns: motor neurons carry impulses from cns to effectors - muscles and glands. Interneurons - memory and learning: peripheral nervous system pns collects info and carries out responses. Dendrites - receive info and send it to cell body. Axon - transmits signals away from cell body. Mylein sheath - membrane layers that insulate axon. Nodes of raniver - interrupt sheath at regular intervals. Schwann cells - form mylein sheaths in pns: describe the various functions of neuroglial cells. Schwann cells and oligodendrocytes - produce mylein sheaths. Schwann cells - produce them in pns (for motor neurons) Small proteins inside cell: graded potential - small continuous changes in potential, depolarizing or hyperpolarizing. Depolarizing - makes membrane potential less negative (more positive)

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