question_answer

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 We obtain energy by aerobic respiration. But anaerobic respiration can sometimes take place in our muscles during vigorous physical exercise when oxygen gets used up faster in the muscle cells than can be supplied by the blood. The accumulation of_____ in the muscles causes muscle cramps

A) glucose            

B) water

C) lactic acid      

D) pyruvic acid