Which Statement About Excitation- Contraction Coupling Is incorrect

Multiple Choice

Which statement about excitation- contraction coupling is incorrect?

A) Troponin binds calcium ion and signals tropomyosin to move.
B) Calcium ion is released from the transverse tubule.
C) Calcium ion is released from the sarcoplasmic reticulum.
D) Relaxation requires uptake of calcium ion by the sarcoplasmic reticulum.
E) Tropomyosin moves to expose myosin binding sites on actin.