Question

A boxer has been jumping rope for an hour. His leg muscles are burning and he feels weak. Which substance is most likely the cause of the burning he feels in his muscles?
A - Carbon Dioxide produced by aerobic respiration.
B - Products produced by alcohol fermentation
C - Oxygen produced from breathing too hard
D - waste products from anaerobic respiration

Answer 1

I think the correct answer from the choices listed above is option D. The substance that most likely the cause of the burning the boxer feels is the waste product from anaerobic respiration. This waste product build up in the muscles after prolonged use.

Answer 2

(D) The waste (amino acids) build up in your muscles after prolonged use, and causes that burning sensation.

A: Wrong - Carbon Dioxide is the waste product of your body intaking oxygen, and is painless.

B: Wrong - Your body does not produce or ferment alcohol.

C: Wrong - Your body does not produce oxygen, it's consumed.