This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
All of the following are true about excitation contraction coupling except: 
Select and explain. 
A. Acetylcholine is released at the nerve terminal, B. Calcium is pumped back into the sarcoplasmic reticulum during relaxation, C. Calcium is released from sarcoplasmic reticulum during contraction, D. Calcium binds to tropomyosin to initiate muscle contraction
D: Calcium binds to tropomyosin to initiate muscle contraction
Answer: D: Calcium binds to tropomyosin to initiate muscle contraction 
Explanation: Ans. d. Calcium binds to tropomyosin to initiate muscle contraction Calcium binds to Troponin C, not to the tropomyosin, to initiate muscle contraction. `The calcium released into the cytosol binds to Troponin C by the actin filaments, to allow cross-bridge cycling, producing force and, in some situations, motion.'