試題詳解

35. Which one of the following statements is NOT true?
(A) Fish gills use a countercurrent exchange system to increase blood flow.
(B) In fish gills, more than 80% of the O₂ dissolved in the water is removed as water passes over the respiratory surface.
(C)In human lungs, cilia and mucus line the epithelium of the air ducts and move particles up to the pharynx.
(D) Respiratory surfaces are always thin and moist.
(E)All of the above.