Most reptiles are almost completely ectothermic; they warm themselves by
A)eating food with high fat content. B)generating excess ATP by shivering. C)evaporation across the skin surface. D)behavioral adaptations. E)countercurrent heat exchange mechanisms.
A countercurrent heat exchanger called the __________ allows bluefin tuna to keep swimming muscles several degrees warmer than tissues near the surface of the body.
A)glomerulus B)Meissner network C)rete mirabile D)Pacinian corpuscle E)portal system