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Which structure is MOST responsible for aqueous humor production?
A. Trabecular meshwork
B. Non-pigmented ciliary epithelium
C. Pigmented ciliary epithelium
D. Iris pigment epithelium
Explanation: The non-pigmented ciliary epithelium (NPE) actively secretes aqueous humor via carbonic anhydrase and ion transport. The pigmented layer provides the blood-aqueous barrier but doesn’t primarily produce aqueous.
