Tag: digestion

Questions Related to digestion

Which of the following statements regarding small intestine are incorrect?
(i) Throughout the small intestine, there are crypts of Lieberkuhn at the base of the villi.
(ii) In duodenum, there are, in addition, small rounds peptic glands.
(iii) The small intestine is strongly -self-protective; by means of a copious production of mucus and a mechanism for the rapid replacement of cells I damaged by contact with fooiLapd. digestive juices.
(iv) Each villus is richly supplied with blood capillaries only.

bio-chemistry digestion digestive glands liver pancreas

  1. (i) and (iv)

  2. (ii) and (iv)

  3. (iii) and (iv)

  4. (i) and (ii)

Show answer
Correct Option: B
Explanation:

The correct answer is (b). 

Brunner's gland is present in

bio-chemistry digestion digestive glands liver pancreas

  1. liver

  2. duodenum

  3. oesophagus

  4. stomach,

Show answer
Correct Option: B
Explanation:

Brunner's gland is present in 'duodenum'.

So the correct option is B.

Sacculus rotundus is a dilated part as posterior end of

bio-chemistry digestion digestive glands liver pancreas

  1. Ileum

  2. Oesophagus

  3. Ilium

  4. Colon

Show answer
Correct Option: A
Explanation:

  • An anatomic structure exclusive to rabbits that are located at the terminal part of the ileum is sacculus rotundus. 
  • It is formed at the distal end of ileum and is expanded to form a small dilated spherical sac in a rabbit.
  •  It is rich in lymphoid tissue. Hence, Sacculus rotundus is a dilated part as posterior end of the ileum.
So, the correct answer is 'ileum'.

Crypts in between the bases of villi in the intestine are crypts of Lieberkuhn. Which of the following cells in these crypts secrete digestive enzymes?

bio-chemistry digestion digestive glands liver pancreas

  1. Pariental cells

  2. Paneth cells

  3. Zymogen cells

  4. Argentaffin cells

Show answer
Correct Option: B
Explanation:


Crypts are anatomical structures that are narrow but deep invaginations into a larger structure. One common type of anatomical crypt is the Crypts of Lieberkühn. Crypts of Lieberkuhn between the bases of villi in the intestine have the Paneth cells which secrete digestive enzymes.

So, the correct option is 'paneth cells'.

A carbohydrate splitting enzyme is secreted by 

bio-chemistry digestion digestive glands liver pancreas

  1. Liver

  2. Zymogen cells of gastric glands

  3. Spleen

  4. Crypts of Lieberkuhn

Show answer
Correct Option: D
Explanation:

While the chyme is present within the small intestine, glands within this structure begin to secrete different types of digestive enzymes, called carbohydrases (amylase, proteases, and lipases or fat splitting enzymes). The glands responsible for these enzymatic secretions are found in the mucosal layer of the small intestine, called the crypts of Lieberkuhn.

Crypts of lieberkuhn are present in

bio-chemistry digestion digestive glands liver pancreas

  1. Intestine

  2. Stomach

  3. Oesophagus

  4. All of the above

Show answer
Correct Option: A
Explanation:

An intestinal gland (crypts of Lieberkuhn) is a gland found in the epithelial lining of the small intestine and colon. The glands are named after German anatomist J. N. Lieberkuhn.

Crypts of Lieber kuhn are present in ___________.

bio-chemistry digestion digestive glands liver pancreas

  1. Intestine

  2. Stomach

  3. Oesophagus

  4. All of these

Show answer
Correct Option: A

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

Show answer
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

Show answer
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

Show answer
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'.