HUMAN NUTRITION

Detailed explanation-1: -Through the gastrointestinal system, the nutritional substances, minerals, vitamins, and fluids, enter the body. Lipids, proteins, and complex carbohydrates are broken down into small and absorbable units (digested), principally in the small intestine.

Detailed explanation-2: -The digestion of macro molecules ingested is completed in small intestine. The digested products are absorbed in the small intestine and comes to the blood.

Detailed explanation-3: -The jejunum is located between the duodenum and the ileum. The jejunum makes up about two-fifths of the small intestine. The main function of the jejunum is absorption of important nutrients such as sugars, fatty acids, and amino acids. The third portion of the small intestine, between the jejunum and the cecum.

Detailed explanation-4: -Answer: (a) Your pancreas produces enzymes that break down fats, carbohydrates, and proteins.

Detailed explanation-5: -The cells in the small intestine have membranes that contain many transport proteins in order to get the monosaccharides and other nutrients into the blood where they can be distributed to the rest of the body. Fructose is absorbed by facilitated diffusion while glucose and galactose are actively transported.