MIT9_14S09_prob07

MIT9_14S09_prob07 - 9.14, MIT, Spring 2009 Class #7-8...

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9.14, MIT, Spring 2009 Class #7-8 Questions on Schneider chapters and lectures: 1) How is the neural tube able to form from a single layer of cells at the surface of the gastrula? What parts of the neural tube are the last to do this? 2) How could changes in cell shape result in invagination of the neural plate to form the neural tube? 3) Contrast symmetric and asymmetric cell division in the CNS. 4) What is the sulcus limitans? What does it separate? 5) Where does myelin appear in phylogeny? (I.e., in what animal groups is it found and not found?) 6) What are three lemniscal pathways carrying information from spinal cord to supraspinal levels of the CNS? 7) Define propriospinal axons. 8) Where is cerebrospinal fluid made, and how does it get both inside and outside the CNS? 9) What are the meninges? Describe the three meningeal layers. 10) What is the special role of astrocytes (astroglial cells) in the blood supply to the brain? 11) Contrast the sympathetic and the parasympathetic nervous systems by giving examples of
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MIT9_14S09_prob07 - 9.14, MIT, Spring 2009 Class #7-8...

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