Thyroids

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 acet…