Calcium is water soluble, but not fat soluble. It is the fifth most dissolved ion in seawater. On the other hand, fat is soluble into calcium in the body. The calcium will exâ¦tract the fat from food in the digestive system, and they combine to form a foamy substance which is not absorbed by the body, and so the fat will be flushed out.
Studies show that it is about 20 percent of the resting metabolic rate, which is about 1,300 calories a day, not of the total metabolic rate, which is about 2,200 calories a day, so the brain uses roughly 300 calories.
Â· just now. Report Abuse. Brains burn calories through general cell maintenance, giving extra special care to keeping certain ion concentrations (like Na+, K+, Cl-, and Ca++) in high gradients across the membrane. Yes, you can train your brain to do stuff. If you study a lot, you will be able to do it better/faster eventually.