Troponin t

... sarcoplasmic reticulum to stimulate contraction (second messenger). The myosin fibers (on actin) are blocked by tropomyosin which is anchored by troponin. Ca2+ binds to troponin causing a conformational change thus moving tropomyosin allowing the myosin binding site to become open. These binding ...

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I'd have to say e) A, B, C Although you might get by saying calcium is the true regulator, its really calcium's presence and its interaction with troponin that allows tropomyosin to moved off the actin binding site.

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... disagree with my professor, so I was hoping to get some other opinions. Regulation of cross-bridge formation is accomplished by a. tropomyosin b. troponin c. calcium ions d. A and B e. A, B, and C

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... of muscle contraction, the action potential causing a release of Calcium from the SR, followed by the "turning off" of tropomyosin by troponin to expose the active sites on the myosin heads so that they can bind to the actin and initiate contraction, then you know what an incredible ...

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Troponin is a serum cardiac marker that is released into the blood in large quantities from the necrotic heart muscle after a heart attack. It is a very good indicator because it remains elevated two weeks after the initial ...

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