Rare Bear

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a child is born with a rare disease in which mitochondria are missing from muscle cells. physicians find?

that the muscles function.not surprisingly, they also find that...
a. the muscles contain large amounts of lactic acid following even mild physical exercise
b. the muscles contain large amounts of carbon dioxide following even mild physical exercise
c. the muscles require extremely high levels of oxygen to function
d. the muscle cells cannot split glucose to pyruvic acid
e. the muscles require extremely large amounts of carbon dioxide to function.

help...it seems that so many questions that i didnt know the answer and hard to break

Ok well its definitely not E. Since the mitochondria is needed for aerobic respiration oxygen will not help this poor child therefore C also wont work. D also does not require a mitochondrion. Carbon dioxide is the waste product of anaerobic respiration in yeast not muscles.

A is the right answer. When we cannot use aerobic respiration but still need to breakdown pyruvate it goes into fermentation which produces lactic acid. When lactic acid is produced it is what gives us the sensation of muscle fatigue.

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