What is the process of an action potential in muscle tissue?

If a muscle cell’s sarcoplasmic reticulum had little to no Ca2+, could the muscle cell still produce an electrical impulse, and would the muscle cell still contract? Explain.

Lower back pain is quite common in America and treatments for this pain include muscle relaxants. How does the drug cyclobenzaprine work as a muscle relaxant at a cellular level? Which part of the muscle contraction is interrupted by cyclobenzaprine? Is it effective on the muscle itself or active in the central nervous system?

a) Through which method of intercellular signaling do motor neurons communicate with muscle fibers? b) Action potentials are an “all or nothing” response, so contraction of muscle fibers downstream of the neuromuscular junction is also an “all or nothing” process. Given that this is the case, briefly describe the two ways that muscles generate varying degrees of force