BIO310H5 Lecture Notes - Lecture 4: Axon Hillock, Schwann Cell, Myelin

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2 Oct 2016
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One of the systems responsible for homeostasis nervous system. Cns (brain and spinal cord, in the vertebral canal) and pns any nerves coming out or going into the cns. Autonomic ns, which is divided into sympathetic and parasympathetic ns. Neurons (specific cells-basic units of nervous system. Have cell bodies, extension so they can connect w each other as a system using electrical signals or chemical signals: the functional unit of nervous systems. Supporting cells glial cells, glial tissue. They either protect cells from outside or are responsible for helping neurons (nutrient delivery, during development: myelin sheath is another type of glial cell, made from schwann cells. Dendrites (extensions from the cells membrane bc they carry from outside of neuron to inside neuron) Axon (another type of extension of cell body. There should be a cavity of cerebrospinal fluid. The presence of astrocytes will regulate amount of nt. They are in between neurons and responsible for removal of cell debris.

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