Final answer:
Gout results in pain due to uric acid crystal buildup in the joints, and it can be controlled through drugs that increase uric acid excretion. Regular use of anti-inflammatory drugs may suppress the immune response.
Step-by-step explanation:
The question pertains to the medical condition known as gout, which is characterized by the deposition of uric acid crystals in the joints, causing inflammation and intense pain.
The correct answer to why gout often results in pain is 'b. Uric acid crystals build up in the joints, resulting in painful body movements'. Options a, c, and d are incorrect because they describe conditions unrelated to gout (urethra swelling, ammonia degradation, and highly concentrated urea respectively, which are not causes of gout). Regular intake of anti-inflammatory drugs such as NSAIDs and steroids can lead to undesirable consequences because they suppress the immune system, potentially increasing the risk of infections.
Gout can be controlled by uricosuric drugs and other medications that enhance the excretion of uric acid, preventing crystal buildup.