Nervous System part 2 Study Questions 1 Name the 3 DCT that surround nerves starting with most superficial to deep 2 are cells that myelinate nerves in the PNS 3 are cells that myelinate nerves in the CNS 4 is a protein lipid sheath that protects insulates increases the speed of transmission of nerve impulses 5 are the spaces or gaps along a nerve that lack Schwann cells 6 What is the main function of Schwann cells and oligodendrocytes 7 supporting cells of nervous system that protect neuron processes cell bodies 8 Name 2 types of glial cells found in PNS 9 Name 4 types of glial cells found in CNS 10 matter consists of long myelinated processes such as axons of motor neurons 11 matter consists of un myelinated cell bodies short processes small neurons 12 White matter of PNS CNS 13 Gray matter of PNS CNS 14 are the functional equivalent of Schwann cells 15 How do Schwann cells and oligodendrocytes differ 16 form the blood brain barrier and help to screen out toxins from CNS 17 Small phagocytic cells that protect nervous system from debris viruses bacteria can be cytotoxic 18 Ciliated neuroglia that help to circulate cerebral spinal fluid 1 Answers 1 epineurium perineurium endoneurium 2 Schwann 3 Oligodendrocytes 4 Myelin 5 Nodes of Ranvier 6 speed up transmission of nervous signals to their effectors 7 neuroglia or glial cells 8 satellite cells Schwann cells 9 oligodendrocytes astrocytes microglia ependymal cells 10 White 11 Gray 12 nerves tracts 13 ganglia example Dorsal Root Ganglion cortex in brain or horns commissure in spinal cord 14 Oligodendrocytes 15 Takes multiple Schwann cells to myelinate 1 nerve 1 oligodendrocytes helps to myelinate multiple nerves although multiple oligodendrocytes are still used to myelinate 1 nerve see text for photo 16 Astrocytes 17 Microglia 18 Ependymal cells 2
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