In human body, the role of bile salts in digestion is to

Act as co-enzymes during the digestion of carbohydrates

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Emulsify fats and facilitate their absorption

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Aid in the break-up of proteins into amino acids and their absorption

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Stimulate the pancreas to release its enzymes

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Solution

The correct option is B Emulsify fats and facilitate their absorption
Bile is a complex fluid containing water, electrolytes and a battery of organic molecules including bile acids, cholesterol, phospholipids and bilirubin that flows through the biliary tract into the small intestine. There are two fundamentally important functions of bile in all species-
1. Bile contains bile acids, which are critical for digestion and absorption of fats and fat-soluble vitamins in the small intestine.
2. Many waste products, including bilirubin, are eliminated from the body by secretion into bile and elimination in feces.
Bile acids have detergent action on particles of dietary fat, which causes fat globules to break down or be emulsified into minute, microscopic droplets.

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Question 27
Read the following passage carefully and answer the questions that follows it.

Bile juice is stored in a sac called the gall bladder, located near its organ of secretion that is the liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released by the pancreas.

(a) Which organ secretes the bile juice?

(b) Why is digestion of fats difficult as compared to that of other nutrients?

(d) Where is the digestion of fat completed?

(e) Does bile juice digest fat completely?

Q. In the process of digestion, the enzymes 'X' in the salivary gland and 'Y' in the pancreas are such that 'X' converts starch into maltose and 'Y' converts proteins to amino acids. Identify X and Y.

Q. Describe the following processes in the body

(a) Coagulation of milk in the alimentary canal. (b) Digestion of fats in the intestine. (c) Digestion of starch in the alimentary canal. (d) Role of bile salts in the digestion and absorption of fats.

Q. Assertion (A): In human body, liver has an important role in fat digestion. It is the largest gland of human body.
Reason (R): The liver secretes bile juice, forms and stores glycogen and play an important role in the metabolism of protein and fats. No enzyme is present in bile juice.

Q. Read the following passage carefully and answer the questions that follow it. Bile juice is stored in a sac called, gallbladder, located near its organ of secretion, the liver. The gallbladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas.

(a) Which organ secretes the bile juice?
(b) Why is digestion of fats difficult as compared to that of other nutrients?
(c) How does bile juice help in the digestion of fat?
(d) Where is the digestion of fat completed?
(e) Does bile juice digest fat completely?

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