Answer:
Can i see the options choices
you question is incomplete??!!!
Explanation:
Anaerobic respiration<span> in muscles. Glucose is not completely broken down, so much less energy is released than during </span>aerobic respiration<span>. There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later. Hope this helps!</span>
<span>He will experience a gradual drop in his testosterone levels as he ages. This will cause a lowered amount of energy and could cause a slight gain in weight. In addition, he may experience fatigue, a loss of body hair, and a general decrease in his strength.</span>
If you look at Cosmos episode 1, I'm sure you find an answer there.
I believe this difference in concentration of dissolved Particles from one location to another is called a concentration gradient.
