In smooth muscle, cross-bridging occurs due to
A. calcium binding to troponin.
B. calcium binding to calmodulin.
C. myosin kinase adding a phosphate to myosin heads.
D. both calcium binding to troponin and calmodulin.
E. both calcium binding to calmodulin and myosin kinase adding a phosphate to myosin heads.
E
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What will be an ideal response?
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A. cancer cells B. normal flora C. epithelial cells D. white blood cells
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