Anatomy All of the following are true about excitation contraction coupling except: 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 💡 Explanation All of the following are true about excitation contraction coupling except: ✓ Correct Answer: D. Calcium binds to tropomyosin to initiate muscle contraction