Arthritis is the general term for diseases that cause
- A. weakening of the muscles
- B. degeneration of the nerves
- C. inflammation of tendons only
- D. inflammation, pain and stiffness of the joints
Explanation
Whatever the cause, arthritis means an inflamed joint that is painful and stiff. The main types differ in mechanism: osteoarthritis wears cartilage away, rheumatoid arthritis is autoimmune, and gout deposits urate crystals.
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