In detail, provide below a summary of the contraction and relaxation of the skeletal muscle cell. In your summary, you must use all of the following terms, structures, or molecules (some may
be used more than once): calcium, sodium, potassium, axon, axon terminal, synaptic cleft,
troponin, actin, acetylcholine, sarcolemma, T-tubule, myosin, synaptic vesicle, terminal cisterns
of SR, action potential, Na+/K+ pump, ACh receptor, tropomyosin, sarcomere, cross-bridge
formation, ATP, and active sites on actin. **This should be in your own words and not copied
from the book or other resource.**