Question

The main function of lacteals in the human small intestine is the absorption of
A. Glucose and vitamins
B. Amino acids and glucose
C. Water and vitamins
D. Fatty acids and glycerol

Answer 1

Hint: Triglycerides are mixed by bile and the enzyme lipase hydrolyzes them, resulting in a combination of fatty acids, di- or monoglycerides. These then travel from the intestinal lumen to the enterocyte, in which they are re-esterified to produce triglycerides.

Complete Answer:
- Lacteal referred to the capillary lymphatic, storing food fats in the small intestine villi. The lacteals combine into larger lymph vessels that bring chyle into the thoracic duct where it is drained into the subclavian vein's blood stream.
- Lacteals form a part of the lymphatic system intended to consume and move fluid which is too large for direct entry into the bloodstream.

Now, let us find the solution from the option.
- Lacteals are small vessels which accumulate fat in the small intestine.
- Lacteals that arise in the finger-like ileum villi have a milky texture and flow into the lymphatic system.
-Bile from the liver causes the emulsification into small droplets for the action of the enzyme lipase so fat can transfer through the lacteal.

Thus, the correct option is (D) Fatty acids and glycerol.

Note: As the triglyceride portion of very low-density lipoproteins, the fat produced from chylomicron residues can be re-exported to the blood from the liver. Lipoproteins of very low density are also susceptible to lipoprotein lipase delipidation and carry fat to tissues throughout the body.