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Question

Which of the following functions is not considered a function of bile juice?


A

Neutralising the acidic traces of food

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B

Providing an alkaline medium for the intestinal proteases

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C

Emulsifying fats

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D

It contains a lipase

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Solution

The correct option is D

It contains a lipase


The correct option is D.

Explanation of the correct option:

  1. The liver is one of the body's main glands and a part of the digestive system.
  2. The liver produces bile, which is then discharged into the gallbladder.
  3. Bile is a fluid-like substance that varies in color from dark green to yellowish brown.
  4. Bile salts, bilirubin, lipids, and inorganic salts make up this substance.
  5. Bile is primarily used in the small intestine to help break down fats.

Lipase:

  1. The body employs the enzyme lipase to digest dietary fats so they may be absorbed in the intestines.
  2. Lipase is found in pancreatic juice.
  3. Lipase is not present in bile.

Explanation for incorrect options:

Option A:

  1. Bile has an alkaline pH on average.
  2. It also helps to neutralize the acid in the stomach before reaching the duodenum; therefore, this option is incorrect.

Option B:

Bile juice generally has an alkaline pH, and it also balances off the excess.

Option C:

  1. The emulsification of lipids in food is aided by bile.
  2. They tend to aggregate around lipid droplets since they are water-soluble on one side and hydrophobic on another.
  3. Therefore this option is also incorrect.

Final Answer: It contains a lipase that is not considered a function of bile juice.


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