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Transcript
muscles All of the following statements comparing fast and slow-twitch muscle fibers are true EXCEPT one. Which one is the EXCEPTION? • fast-twitch fibers are about twice as large in diameter than slow-twitch muscle fibers • slow-twitch fibers have a greater resistance to fatigue than fast-twitch muscle fibers • the enzymes of oxidative phosphorylation are considerably more active in slowtwitch fibers than in fast-twitch fibers • fast-twitch fibers contain more mitochondria and myoglobin than slow-twitch muscle fibers • fast-twitch fibers can deliver extreme amounts of power for a few seconds to a minute versus slow-twitch fibers 35 copyright © 2013-2014 Dental Decks BIOCHEMISTRY/PHYSIOLOGY
