NEET Practice Questions (MCQs) with Answers & Solutions

The hepatic lobules are the structural and functional units of liver containing hepatic cells arranged in the form of cords. Each lobule is covered by a thin connective tissue sheath called the Glisson’s capsule.

The duct of gall bladder called as cystic duct along with the hepatic duct from the liver forms the common bile duct.

The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the gall bladder.

The saliva secreted into the oral cavity contains electrolytes (Na⁺, K⁺, Cl^–, HCO^–) and enzymes, salivary amylase and lysozyme and has an optimum pH of action- 6.8.

 $\mathrm{Starch}\underset{\mathrm{pH} 6.8}{\overset{\mathrm{Salivary} \mathrm{Amylase}}{\to }}\mathrm{Maltose}$

(page-262)

The bile, pancreatic juice and the intestinal juice (succus entericus) are the secretions released into the small intestine. Pancreatic juice and bile are released through the hepato-pancreatic duct. (page-262)

The pancreatic juice contains inactive enzymes – trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases. (page- 262)

Involuntary contractions generated by longitudinal and circular muscles is called as peristalsis. It occurs in oesophagus, stomach and intestine.

The bile contains bile pigments- bilirubin and bili-verdin, bile salts, cholesterol and phospholipids but no enzymes. Bile helps in emulsification of fats, i.e., breaking down of the fats into very small micelles. (page-263)

The bile contains bile pigments- bilirubin and bili-verdin, bile salts, cholesterol and phospholipids but no enzymes. Bile salts helps in emulsification of fats, i.e., breaking down of the fats into very small micelles. (page-263)