<span>Collin often experiences a "runner's high" during his daily three-mile run. this is most likely produced by endorphins.
Endorphins are related to a group of hormones which are secreted within the brain and the nervous system, it is like morphine chemicals which are produced. It is mostly produced when you exercise a lot, run high or stress etc.</span>
<h3>I think it's answer (c) I hope you are satisfied with my answer </h3>
I think the largest amount of total body water is found in the:
D. Intracellular Fluid
According to the Wikipedia, it is stated that 70% of body water is intracellular.
