Question
Countercurrent flow allows _________ to maximize their oxygen uptake from water.a. fishesb. flatwormsc. frogsd. whales
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Countercurrent flow is a mechanism that occurs in nature where two currents flow in opposite directions to each other. This mechanism is used by many organisms to maximize the diffusion of substances. Show more…
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Countercurrent flow of water and blood increases the efficiency of gas exchange in ________. a. fishes b. amphibians c. birds d. all of the above
Countercurrent flow of water and blood increases the efficiency of gas exchange in ________. a. fish b. amphibians c. birds d. all of the above
The countercurrent exchange mechanism in fish gills a. maximizes oxygen diffusion into the bloodstream. b. is a less efficient mechanism for gas exchange than that used in mammalian lungs. c. occurs because the flow of blood is in the same direction as water flowing across the gills. d. facilitates diffusion of carbon dioxide into the blood of the fish. e. facilitates diffusion of oxygen to the environment.
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