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Unformatted text preview: cause a change in the structure of tropomyosin. We6 rropininiinds Ca2' which changes the structure of tropomyosin to reveal myosin binding sites' Therefore, Ca2* controls how much contraction occurs' The neuromuscular junction is where a signal is sent to the muscle' The signar moves over the muscre fiber through r-tubures so that the sarcomeres ail contract at the same time. Thesignalsentcausesareleaseofca2*f,o'th"@Thiscalciuminitiatesmuscle contraction. Uptake of Ca2'stops the contraction ' fr4:ff7@1...
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- Fall '10