Question

Which of the following is not found in hepatic portal circulation in post absorptive phase:-

• A. Glucose
• B. Chylomicron
• C. Amino acid
• D. $N{a}^{+}$

Answer 1

The correct option is B Chylomicron

Glucose is absorbed from intestine with the help of Na+ ion. Also, amino acids (the end product of protein digestion ) are absorbed in the intestine. These nutrients are absorbed via the portal vein and brought to the liver for storage and metabolism.

Chylomicrons are formed in the endoplasmic reticulum in the absorptive cells of the small intestine. Newly formed chylomicrons are secreted through into the lacteals, where they join lymph to become chyle. The lymphatic vessels carry the chyle to the venous return of the systemic circulation. From there the chylomicrons supply the tissue with fat absorbed from the diet. Thus, unlike the glucose and amino acids that digestion liberates from the carbohydrates and proteins of the diet (respectively), the lipids from the diet bypass the hepatic portal system.

So, the correct option is 'chylomicron'.