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Human Body & Health

Why does lymphedema, chronic tissue swelling, persist after initial inflammatory phase reduction?

A)Reduced aquaporin-1 water channel expression
B)Increased histamine-induced vasodilation occurs
C)Elevated angiotensin II receptor activity
D)Impaired lymphatic vessel smooth muscle contraction

💡 Explanation

Lymphedema persists because of mechanical failure of lymphatic drainage; specifically, impaired lymphatic vessel smooth muscle contraction prevents adequate fluid transport. This leads to chronic fluid accumulation rather than temporary inflammation, therefore lymphatic dysfunction explains the long-term swelling.

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