If Necessary, Our Muscles Can Rely Upon an Anaerobic (Fermentative)

question 21

Multiple Choice

If necessary, our muscles can rely upon an anaerobic (fermentative) pathway to metabolize glucose, but this can only last a short period of time. Why can't our cells survive very long under such anaerobic conditions?

• A) Fermentation doesn't extract enough ATP from glucose to sustain our energy-craving cells.
• B) Anaerobic conditions create a "carbon dioxide debt" that must be repaid before cells die.
• C) The ethyl alcohol that builds up in muscles as a result of fermentation is a toxin.
• D) Lactic acid causes the cell to die when it's exposed to even lower concentrations.

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