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PSYC 2410 Chapter Notes - Chapter 9: Radial Glial Cell, Retinal Ganglion Cell, Neural Tube

36 views9 pages
erindonkey275
19 Apr 2012
School
University of Guelph
Department
Psychology
Course
PSYC 2410
Professor
Boyer Winters

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Document Summary

Chapter 9: development of the nervous system - from fertilized egg to you. The brain is a plastic (changeable) living organ that continuously changes in response to its genetic program and environment. Begins as a zygote (fertilized egg) which divides into two daughter cells and so forth. Neural plate: small patch of ectodermal tissue on the dorsal surface of the developing embryo that appears 3 weeks after conception. Development is induced by chemical signals from the mesodermal layer (organizer) The earliest cells of the human embryo are totipotent (able to develop into any cell type). When the neural plate develops, some cells become multipotent (able to develop into most types in the mature nervous system, but not other kinds of cells) Unlimited renewal is a result of one daughter cell becoming a body cell and the other a stem cell following division, however, eventually errors accumulate during mitosis and the process is disrupted.

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Related Questions

41. The fact that researchers have found that rat pups that were raised in a stimulating early environment have larger neurons and more dendrite branches supports A) the idea that brain development is primarily genetically determined B) the idea that the environment has an important impact on brain development C) the idea of neural plasticity D) all of the above E) Only B) and C) above

24. In developmental research, an) period is an age range during which specific experiences must take place if normal development is to occur. This is in contrast to period, where it is optimal but not necessarily essential for these experiences to occur A) sensitive; critical B) critical; receptive C) critical; sensitive D) explicit; sensitive E) none of the above are correct

10. Dreams often involve sudden emotional reactions and surprising changes in scene. This best serves to support the theory that dreams a represent the brain's attempt to interpret random neural activity. b. provide a summary of the previous day's events. c. reflect one's level of cognitive development. d. represent our failures and current fears.