BIO310H5 Lecture Notes - Lecture 3: Electrochemical Gradient, Peripheral Nervous System, Central Nervous System

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14 Jul 2016
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Central nervous system: spinal cord and brain (enclosed in the skull) spine ( enclosed in the vertebrae) Spinal nerves form ( peripheral nervous system) could be sensory ( towards central. Nervous system) or motor ( away from the cns) Neurons form network and communicate with each other with electrical and chemical signals. Every neuron has a cell body (soma): processing of the information and dendrites to receive info; axons transit signal and moves it to the target. In some unipolar cells dendrites functions as the axons. Brain and spinal cord - central canal (csf): ependymal cell circulate the csf. Astrocytes: convey nutrients and remove debris from the neuron. Oligodendrocyte: produce schwan cell in the peripheral nervous system. Oligodendrocytes (cns) send signal to as many axons possible. Schwan cells (pns) enclose part of the axon. Axon hillock: ap generates there (origin of axon) Axon terminals send signal to the target organ, glands and other muscles.

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