Problem 1: Describe the events that occur from the time a motor neuron releases acetylcholine at the neuromuscular junction until a muscle contraction occurs.
Problem 2: Drugs are used to relax muscles during major surgery. Which of the two chemicals described next would make the best muscle relaxant and why? Chemical A binds and blocks acetylcholine receptors of muscle cells. Chemical B floods the cytoplasm of muscle cells with calcium ions.