Proteins that comprise most of the muscle tissue?

1. Beef, chicken, and fish are all high protein foods that are to stop primarily composed of muscle. What are the two proteins that comprise most of the muscle tissue?
2. Name two things that must happen for the myosin to stop binding to the actin, that is, for the muscle to relax, and explain why each is necessary.
3. How is the increased force produced by summation and tetanus different from recruitment? In what way are they similar?

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