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AIIMS2013ZoologyDigestion and Absorption

Assertion : Duodenum is the main organ of small intestine. Reason : In duodenum, digestion and absorption mainly occurs.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false

Correct answer

D. If both assertion and reason are false

Step-by-step solution

Principal organ for digestion and absorption for nutrients is small intestine. Small intestine is distinguishable into three regions, a 'U' shaped duodenum, a long coiled middle portion jejunum and a highly coiled ileum. Mainly iron, calcium and amino acids are absorbed in duodenum; fatty acids, glycerol, monosaccharides and vitamins are absorbed in jejunum, and absorption of vitamin B₁₂ , bile salts and water occur in ileum.

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