試題詳解

46. Which of the following statements concerning striated muscle is correct?
(A) Striation in the muscle fiber is formed by regularly aligned microtubules and thin filaments.
(B) Contraction of striated muscle is independent of calcium ions.
(C) Myosin heads use energy stored in ATP to propel microtubules.
(D) Calcium binding to troponin complex shifts the position of tropomyosin on the thin filaments.