52. How does countercurrent exchange in fish gills enhance oxygen absorption?
(A) Blood and water flow oppositely, maximizing oxygen diffusion
(B) Water flows faster, increasing oxygen intake
(C) Blood absorbs oxygen actively, not passively
(D) Gills store oxygen for later use
(E) Oxygen moves from low to high concentration
答案:登入後查看
統計: A(8), B(2), C(0), D(0), E(0) #3429731
統計: A(8), B(2), C(0), D(0), E(0) #3429731