Which of the Following Statements Are True of the Sliding

Which of the following statements are true of the sliding filament mechanism (Select all that apply) ?

A) The calcium ions released from the sarcolemma bond to troponin.
B) The sarcoplasmic reticulum inhibits contraction until a nerve impulse arrives.
C) With calcium ions,troponin shifts tropomyosin away from actin.
D) Myosin filaments pull actin filaments toward the center of the sarcomere.
E) Myosin releases the energy from ATP.
F) When a muscle fiber contracts,all of its sarcomeres contract.