Question

if a runner is doing vigorous exercise, which results from the anaerobic cellular process?
accumulation of lactic acid
accumulation of oxygen
depletion of ethanol
depletion of carbon dioxide

Explanation:

During anaerobic cellular respiration in humans, glucose is broken down without sufficient oxygen. Instead of the complete aerobic - respiration pathway, pyruvate is converted to lactic acid. Ethanol production occurs in yeast during anaerobic respiration, not in human muscle cells. Accumulation of oxygen is not related to anaerobic processes. Carbon - dioxide is a product of aerobic respiration, not a characteristic of anaerobic cellular respiration in humans during vigorous exercise.

Answer:

accumulation of lactic acid