Select the correct option to test your answer: A Contracts when calcium is taken up by sarcoplasmic reticulum B Contracts when actin and myosin filaments shorten C Contraction is initiated by calcium binding to troponin D Contraction is initiated by calcium binding to tropomyosin Correct Answer: Option C (Contraction is initiated by calcium binding to troponin) Verified correct option for Medical (Muscles And Neuromusclar Junction).