Question

What does the Jejunum do? Also tell us how its behavior is controlled. As part of your answer, imagine that you have eaten a greasy hamburger on a high fiber (both soluble and insoluble) bun and tell us what would be happening to it as a result of the activity of this structure.

Answer 1

The jejunum is the part of small intestine, involved in the absorption of the amino acids, sugar and fatty acids. The behavior of the jejunum is under the vagus motor control and causes the a strong, quick involuntary smooth muscle contraction (peristalsis). The greasy hamburger on a high fiber bun contains the protein,fat ,carbohydrate and fibers. The proteins ,fat and carbohydrate breaks down occurs in the small intestine into amino acid, fatty acid and glycerol, sugar by the action of enzymes secreted by stomach,pancreas and intestine.The absorption of amino acids, sugar and fatty acids occurs in the jejunum and transfers into blood Capillaries and lymph capillaries  but fibers don't get absorbed her ,it moves to the large intestine for removal from body in the form of feces.