Nаme the twо myоfilаments thаt make up a sarcоmere. Describe the structure of these two filaments in detail. (3 pts) Describe how these two filaments interact to enable a muscle to contract. Discuss what steps need to take place in order for the filaments to interact and how they interact during contraction. (4 pts) Imagine an individual whose skin did not produce vitamin D. Vitamin D is essential for calcium absorption from ingested foods. How would a lack of vitamin D production affect muscle contraction within this individual? (2 pts) A soil bacterium has the ability, under low-oxygen conditions, to release a toxin that causes increased binding of acetylcholine to receptors on the sarcolemma. How might this toxin affect muscles? (1 pt)