KEY TERMS Key Terms and Concepts The Control of Movement 1. Muscles and their movements Categories of muscle Smooth Skeletal or striated Cardiac Precise movements: few muscle fibers innervated by each axon Neuromuscular junction Acetylcholine Muscle contraction Antagonistic muscles Flexor Extensor Myasthenia gravis Autoimmune attack on acetylcholine receptors at neuromuscular junctions Progressive weakness and rapid fatigue Depletion of acetylcholine after several action potentials in rapid succession Treatment Drugs that suppress immune system Drugs that inhibit acetylcholinesterase (…
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