Answer:
https://www.ncbi.nlm.nih.gov/books/NBK279457/
Explanation:
all the stuff right here bud or girl GOOD LUCK
ATP-driven pumps will move Ca ++<span> out of the sarcoplasm back into the SR. This results in the “reshielding” of the </span>actin<span>-binding sites on the thin filaments. Without the ability to form cross-bridges between the thin and thick filaments, the </span>muscle<span>fiber loses its tension and relaxes.</span>
