Chapter 35, Problem 6A

Summary Introduction

Introduction:

The process of digestion is defined as the breaking down of complex substances consumed through the diet into smaller substances to get energy. The digested and absorbed nutrients are also stored in different forms in the body which can be used by the body later on. The undigested food is removed out of the body through the process of excretion. The digestion process starts in the mouth and every region of the gastrointestinal tract contributes to the whole process.

Answer to Problem 6A

Correct answer:

The correct answer is option (B) the duct leading from the liver and gallbladder is blocked.

Explanation of Solution

Explanation/justification for the correct answer:

Option (B) the duct leading from the liver and gallbladder is blocked. The digestion of fat majorly occurs in the small intestine and with the help of bile. Bile emulsifies the fat and thus assists in fat digestion. Bile juice is produced in the liver and is stored in the gallbladder. It is also transported from the liver directly into the small intestine through a duct connecting the liver, gall bladder, and intestine. Therefore any blockage in this duct may prevent the entry of bile in the intestine and thus fats will not be digested. So, the correct answer is option (B).

Explanation for incorrect answer: 

Option (A) the sphincter at the bottom of the stomach is not allowing bile to pass into the small intestine. The digestion of fat majorly occurs in the small intestine and with the help of bile. Bile emulsifies the fat and thus assists in fat digestion. Bile juice is produced in the liver and is stored in the gallbladder. It is also transported from the liver directly into the small intestine through a duct connecting the liver, gall bladder, and intestine. The sphincter at the bottom of the stomach allows the passage of chyme and not for bile. So, this is an incorrect option.

Option (C) the person is secreting excess bile. The digestion of fat majorly occurs in the small intestine and with the help of bile. Bile emulsifies the fat and thus assists in fat digestion. Lack of bile results in the indigestion of fat but excess bile will lead to watery stool or diarrhea. So, this is an incorrect answer.

Option (D) the stomach is not acidic enough for the digestion of fats. The digestion of fat majorly occurs in the small intestine and with the help of bile. The acidity of the stomach and enzymes in the stomach majorly digests proteins and not fats. So, this is an incorrect answer.