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BPK 205 (11)
Chapter 8

ch. 8a practice exam questions

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Simon Fraser University
Biomedical Physio & Kines
BPK 205
Parveen Bawa

6 Draw and label the main gross structures of the central nervous system In a few sentences describe what you have drawnThe central nervous system consists of the brain and the spinal cord The spinal cord is divided into the cervical thoracic lumbar sacral and coccygeal regions The brain stem medulla pons and midbrain leads into the diencephalon thalamus hypothalamus which is capped by the cerebral cortex 7 What are glial cellsWhat are their functions Separate these cells clearly for the PNS and CNS two pages should take you25 minutes to write with no figureGlial cells are nonexcitable cells of the nervous system They do not carry any information unlike neurons They are considered support cells that keep the neurons alive and healthyThere are two types of glial cells only found in the PNS These are Satellite cells and Schwann cellsSchwann cells form the myelin sheath of neurons that cover the axons The Schwann cells form internodes along the axon This myelin sheath speeds up nerve signals that travel along the axons It also help regenerate axons in two different ways One is by providing trophic factors that promote axon regeneration and the other is by providing physical support to hold up axons
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