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What is Nutrients are mainly absorbed in: and explain in detail?
Proteins, carbohydrates, fats and other nutritive substances like vitamins, and minerals are absorbed mostly in small intestine.
In the small intestine, secondary active transport of Na+ is important in bringing about absorption of glucose, some amino acids, and other substances such as bile acids.
Reference: GUYTON AND HALL TEXTBOOK OF MEDICAL PHYSIOLOGY, THIRTEENTH EDITION(INTERNATIONAL EDITION ) page no 464