6. In vertebrates relying on extracellular digestion, which intestinal feature most directly enhances the rate of nutrient uptake across the epithelial barrier?
(A) Slowness of intestinal transit time
(B) Maintenance of low luminal pH levels
(C) Increased thickness of intestinal muscle layers
(D) Emulsifying action of luminal bile salts
(E) Expansion of epithelial surface area

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統計: A(0), B(0), C(0), D(1), E(6) #3852860

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動物生理學 (Animal Physio...
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