Brenda ran a 5 km race. During the race, she began to breathe heavily, and some of her muscles began to burn. Which of these exp
lains why Brenda felt a burning in her muscles during the race? Choose the correct answer. The cells did not have enough oxygen, so they used fermentation as a source of energy.
The cells did not have enough glucose, so they used fermentation as a source of energy.
The cells had too much glucose, so they used aerobic respiration as a source of energy.
The cells had too much carbon dioxide, so they used aerobic respiration as a source of energy.
