Answer: B. In hypoxic tissues, in contrast to normoxic tissues, ATP is additionally consumed to transform lactate to pyruvate
Explanation:
In hypoxic tissues such as new cancerous cells, the vascular system is still underdeveloped, thus oxygen supply is reduced. To meet energy need, additional glucose is needed to convert lactate (result of anaerobic glycolysis) to pyruvate which can then go into the TCA cycle to yield energy. This phenomenon is very common in muscle tissues during exercise.
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▹ Answer
<em>A. Make up tissues</em>
<em>C. The most complex level of organization of life</em>
▹ Step-by-Step Explanation
A is one of the correct answer choices since cells → tissues → organs → organ systems.
C is the second correct answer choice since cells have such an amazing structure that functions in surprising ways. Cells are our whole body and they function daily in our body, showing that it is very complex.
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Cells are not simple structures at all. They have numerous organelles and serve numerous functions working together with millions of other cells. They are highly complex machines on their own that are combined with other highly complex machines to build anything, from smallest to largest organisms. For some unicellular ones they even do other things that cells in multicellular organisms don't.