Tag: alimentary canal

Questions Related to alimentary canal

Villi are present in

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Stomach

  2. Intestine

  3. Oesophagus

  4. Both  A and B

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Correct Option: B
Explanation:
  • Villi are small finger-like projections on the surface of the intestine which increase the area of absorption.

So, the correct answer is 'Intestine'.

Which of the following are secreted by duodenum or small intestine?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Enterokinin

  2. Secretin

  3. Villikinin

  4. All of the above

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Correct Option: D
Explanation:

(A) Enterokinin is the hormone secreted by Brunner's gland activates the inactive enzyme of the pancreas and convert procarboxypeptidase into carboxypeptidase.

(B) Secretin secreted bu duodenum into blood stimulates the secretion of the pancreas and liver.
(C) VIlikinin is released by duodenal mucosa and increases the motility of villi.
So the correct option is 'All of the above.

The pH of human small intestine is around $7.5$ and the pH of large intestine can be $5.5$. As substances travel from the small intestine to larger intestine, what would happen to the $H^+$ ions concentration?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Increases $20$ fold

  2. Increases $2$ fold

  3. Increases $10$ fold

  4. Increases $100$ fold

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Correct Option: D
Explanation:

pH scale is not a linear scale like a centimetre or inch scale (in which two adjacent values have the same difference). It is a logarithmic scale in which two adjacent values increase or decrease by a factor of 10. As pH 7.5 and 5.5 differ by 2, the difference in H$^{+}$ ion concentration between them would be 10$^{2}$ = 100.

So, the correct option is 'Increases 100 fold'.

Partially digested acidic food released from the stomach into the duodenum is called as ________.

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Food bolus

  2. Chyme

  3. Chyle

  4. Faeces

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Correct Option: A

If the pH of duodenum decreases below $5$, then secretion of ________ stop.

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Secretin

  2. Enterokinase

  3. CCK

  4. Gastrin

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Correct Option: A

In small intestine, active absorption occurs in case of?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Glucose

  2. Alcohol

  3. Water

  4. All the above

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Correct Option: A

Match the two column and select the right one among options given.

Column I Column II
A. Duodenum i. A cartilaginous flap
B. Epiglottis ii. Small blind sac
C. Glottis iii. 'U' shaped structure emerging from the stomach
D. Caecum iv. Opening of wind pipe
bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. A-i, B-ii, C-iii, D-iv

  2. A-iv, B-iii, C-ii, D-i

  3. A-iii, B-i, C-iv, D-ii

  4. A-ii, B-iv, C-i, D-iii

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Correct Option: A

The folds of Kerkring are developed in?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Duodenum

  2. Jejunum

  3. Rectum

  4. Large intestine

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Correct Option: A

Sphincter that helps in opening of stomach into duodenum ____________.

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Cardiac

  2. Pyloric

  3. Anal

  4. Gastric

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Correct Option: A

The folds of Kerkring are developed in

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Duodenum

  2. Jejunum

  3. Ileum

  4. Large intestine

Show answer
Correct Option: B
Explanation:

The entire small intestine has circular folds of the mucous membrane, the valves' of kerkring These folds are more prominent in the jejunum.