EHS 350 Lecture Notes - Lecture 7: Myelin, Ependyma, Schwann Cell
19 Jun 2017
School
Department
Course
Professor
Document Summary
2 types of cells neurons create and conduct nerve impulses. 50% of cells glial cells supporting cells for neurons also 50% Types of glial cells glial types astrocytes attach to neurons and capillaries hold things in place transfer nutrients to neuron clean up chemical imbalances. Microglia defensive cells act against invadens - like macrophages for cns ependymal cells line internal spaces of brain and spinal cord circulate cerebrospinal fluid (inside brain) oligodendrocytes produce a myelin sheet satellite cells. Maintain neurons like astrocytes schwann cells create myelin sheaths in pns. Neurons cell body make needed cell components a lot of transport of materials from cell body to axons and dendrites plasma membrane of cell body conducts potential and electrical signal differences. Myelin sheath speed up nerve impulse found on axons not dendrites. Made up of fat (myelin) electrically insulates neuron schwann cells.
