Which is true about inline skates? a. they were the first kind of roller skates to be invented, and were later re-purposed as rollerblades b. they are dangerous to use, and skaters must sign a waver before purchasing a pair c. they have been used on the moon d. they are only used in urban settings

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.