A scientist extracts and measures the calcium content of one of your muscle fibers while you are asleep, when all of your muscles are relaxed. Where is the scientist likely to find calcium?  In the T-tubules  In the sarcoplasmic reticulum  Bound to tropomyosin  Bound to troponin

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Chapter6: The Muscular System
Section: Chapter Questions
Problem 6SQ: Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c....
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A scientist extracts and measures the calcium content of one of your muscle fibers while you are asleep, when all of your muscles are relaxed. Where is the scientist likely to find calcium?

 In the T-tubules

 In the sarcoplasmic reticulum 

Bound to tropomyosin

 Bound to troponin

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