Answer: Energy is the ability to do work and allows living things to perform all the functions necessary to live.
Normally, the concentration of solutes in our brain cells would be the same as the concentration of the cerebrospinal fluid. Thus, they form an isotonic solution.
Cryptzoology is not considered a science, because some don't take it seriously, and scientists do not have a perfect explanation for it. So it is considered a psuedoscience.