PS%203 - Page 1 of 1 BIOE 322/BIOS 332 Fundamentals of...

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Unformatted text preview: Page 1 of 1 BIOE 322/BIOS 332 Fundamentals of Systems Physiology Spring 2008 Problem Set #3 DUE : F 2/8/08 1. In patients with poliomyelitis, motor neurons are destroyed, causing loss of muscle function and even flaccid paralysis. Sometimes recovery occurs because of the formation of axon branches from the remaining motor neurons. These branches innervate the paralyzed muscle fibers to produce motor units with many more muscle fibers than usual, resulting in the recovery of muscle function. What effect would this reinnervation of muscle fibers have on the degree of muscle control in a person who has recovered from poliomyelitis? 2. Design an experiment to test the following hypothesis: Muscle A has the same number of motor units as muscle B. Assume you could stimulate the nerves that innervate skeletal muscles with an electronic stimulator and monitor the tension produced by the muscles. Draw tension versus time curves that you expect for the two muscles if the hypothesis holds. Draw tension versus time curves that you expect if muscle A has for the two muscles if the hypothesis holds....
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