How are synapses between neurons and the neuromuscular junction the same and how are they different?

Explain each question using at least 250 words. Should be a total of 1000 when finished.

1. How is information relayed by the spinal cord.

2. Explain the sliding filament model, and are all filaments the same?

3. Explain excitation-contraction coupling

4. How are synapses between neurons and the neuromuscular junction the same and how are they different?