Which statement about excitation-contraction coupling is incorrect?
A) Troponin binds calcium ion and signals tropomyosin to move.
B) Tropomyosin moves to expose myosin binding sites on actin.
C) Relaxation requires uptake of calcium ion by the sarcoplasmic reticulum.
D) Calcium ion is released from the sarcoplasmic reticulum.
E) Calcium ion is released from the transverse tubule.
Answer: E