The presence of which kind of molecule determines the concentrations of other substances in the body? water carbohydrate protein sugar

Select the correct answer from each drop-down menu proteins are

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

What is the primary function of the nervous system?