Wood frogs freeze solid during the winter and then thaw in the spring. As the freezing progresses, blood circulation stops. How would you expect cells not being served by the circulatory system to produce ATP during this time, and what by-product would you expect to build up in the cells?

Question

Quizplus · Accepted Answer

During the freezing process, the lack of blood circulation would likely prevent oxygen from reaching the cells, making aerobic respiration impossible. Instead, cells would resort to fermentation to produce ATP. The by-product of fermentation in animals is lactate, so option B is the best choice.

Wood Frogs Freeze Solid During the Winter and Then Thaw