Countercurrent exchange allows A) blood to be fully oxygenated as the water flow

Question

Countercurrent exchange allows A) blood to be fully oxygenated as the water flows across the gills of a fish. B) gas exchange as blood in the dorsal vessel of an insect is pushed out to the air filled tracheae. C) heat transfer from the supplying artery to the returning vein in the fluke of a dolphin, thereby conserving heat and metabolic energy. D) for the flow of water across the skin of a frog to oxygenate blood within its veins. E) Two of the above are correct. An ectothermal animal that has few or no options when it comes to behaviorally modifying its body temperature is. A) terrestrial lizard B) a sea anemone or other marine invertebrate C) a dog D) a humming bird

Explanation / Answer

16 )the answer of countetcurrent exchange allows is E:the two of the above are currect.

17) an ectothermal animal that has few or no options when it comes to behaviorally modifying its body temperature is A) terrestial lizard

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