What is the roleof calcium ions, troponin and F - actin during contraction in striated muscles in humans ? Represent diagrammatically the stages in the cross bridge formation.
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In turn this triggers the sarcoplasmic reticulum to release calcium ions into the muscle interior where they bind to troponin, thus causing tropomyosin to shift from the face of the actin filament to which myosin heads need to bind to produce contraction. ... This is the steric blocking mechanism of muscle regulation.
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