MIT9_14S09_prob01

MIT9_14S09_prob01 - 9.14, MIT, Spring 2009 Questions on...

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9.14 , MIT, Spring 2009 Questions on readings: 1) Explain what is meant by “brainlike functions in unicellular organisms”. Give examples (see Allman and Swanson). 2) According to Allman, what are the simplest organisms to possess nervous systems, with action potentials based on voltage gated sodium channels? 3) George Parker’s work at Yale (Swanson says he was at Harvard) is described by Nauta. Parker, using the Golgi technique, found a kind of nervous system in certain sea anemones, an even simpler organism. What kind of nervous system was it? 4) “…a sponge has no neurons—or else all its cells are neurons” (Nauta). What two types of intercellular junctions in the sponge was Nauta discussing? How are they recognized? 5) “Animals with large brains are rare—there are tremendous costs associated with large brains” (Allman). What costs? 6) Swanson describes the nerve net of hydra, including two-way connections made by motor neurons with each other. What structure makes such two-way conduction in single fibers
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This note was uploaded on 11/11/2011 for the course BIO 9.07 taught by Professor Ruthrosenholtz during the Spring '04 term at MIT.

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MIT9_14S09_prob01 - 9.14, MIT, Spring 2009 Questions on...

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