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Digestion and Absorption · Question 44

AIPMT 2008MCQEasy📈 Topic in 12% papers+4−1
1

What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

  1. In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
  2. Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin.
  3. Gastric juice will be deficient in chymosin.
  4. Gastric juice will be deficient in pepsinogen.

Answer

(1) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.

Solution

As per NCERT, parietal (oxyntic) cells secrete HCl and Castle's intrinsic factor; chief (peptic) cells secrete pepsinogen.

Pepsinogen is converted into the active enzyme pepsin on exposure to HCl.

If parietal cells are blocked, there is no HCl and pepsinogen is not activated to pepsin.

Enterokinase (duodenum), chymosin/rennin and pepsinogen (chief cells) do not depend on parietal cells.

Answer: (1)

Out of syllabusAIPMT 2008

Keep practising — Digestion and Absorption

2

Which one of the following is a fat-soluble vitamin and its related deficiency disease?

  1. Retinol – Xerophthalmia
  2. Cobalamine – Beri-beri
  3. Calciferol – Pellagra
  4. Ascorbic acid – Scurvy
Out of syllabusAIPMT 2007
3

Secretin and cholecystokinin are digestive hormones. They are secreted in

  1. pyloric stomach
  2. duodenum
  3. ileum
  4. oesophagus.
Out of syllabusAIPMT 2005
4

Epithelial cells of the intestine involved in food absorption have on their surface

  1. pinocytic vesicles
  2. microvilli
  3. zymogen granules
  4. phagocytic vesicles.
Out of syllabusAIPMT 2005
5

A patient is generally advised to specially consume more meat, lentils, milk and eggs in diet only when he suffers from

  1. scurvy
  2. kwashiorkor
  3. rickets
  4. anaemia.
Out of syllabusAIPMT 2005
6

Which group of three of the following five statements (1–5) contain all three correct statements regarding beri-beri? 1. A crippling disease prevalent among the native population of sub-Saharan Africa 2. A deficiency disease caused by lack of thiamine (vitamin B1) 3. A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein 4. Occurs in those countries where the staple diet is polished rice 5. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.

  1. 2, 4 and 5
  2. 1, 2 and 4
  3. 1, 3 and 5
  4. 2, 3 and 5
Out of syllabusAIPMT 2005
7

The richest sources of vitamin B12 are

  1. goat's liver and Spirulina
  2. chocolate and green gram
  3. rice and hen's egg
  4. carrot and chicken's breast.
Out of syllabusAIPMT 2004
8

Which one of the following pairs is not correctly matched?

  1. Vitamin B12 - Pernicious anaemia
  2. Vitamin B6 - Convulsions
  3. Vitamin B1 - Beri-beri
  4. Vitamin B2 - Pellagra
Out of syllabusAIPMT 2004
9

Which one of the following pairs is not correctly matched?

  1. Vitamin C – Scurvy
  2. Vitamin B2 – Pellagra
  3. Vitamin B12 – Pernicious anaemia
  4. Vitamin B6 – Beri-beri
Out of syllabusAIPMT 2003
10

During prolonged fasting, in what sequence are the following organic compounds used up by the body?

  1. First carbohydrates, next fats and lastly proteins
  2. First fats, next carbohydrates and lastly proteins
  3. First carbohydrates, next proteins and lastly lipids
  4. First proteins, next lipids and lastly carbohydrates
Out of syllabusAIPMT 2003
11

Stool of a person is whitish grey coloured due to malfunction of which of the following organs?

  1. Pancreas
  2. Spleen
  3. Kidney
  4. Liver
Out of syllabusAIPMT 2002

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