Tag: role of intestine

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Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen? 

  1. The pancreatic enzymes and specially the trypsin and lipase will not work efficiently.

  2. The pH of stomach will fall abruptly.

  3. Steapsin will be more effective.

  4. Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parietal cells secrete HCl and intrinsic factor. Parietal glands also secrete pepsinogen to which hydrochloric acid acts to convert it into pepsin. Pepsin in return causes digestion of protein. If parietal cells become non-functional, it will directly affect protein digestion. So, the correct answer is (d).

Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

When the acidic food from stomach comes to small intestine which of the following acts on it to make it alkaline?

  1. Bile

  2. Trypsin

  3. Pepsin

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The pancreatic enzymes and intestinal enzymes are optimally active in alkaline pH (8.0-8.4) in the small intestine.
  • Thus, the acidic food from stomach is made alkaline by the action of bile.
  • Bile is alkaline in nature as it contains organic salt known as bile salt.
Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine mechanism of digestion

Protein digesting enzyme is

  1. Pepsin

  2. Ptyalin

  3. Amylase

  4. Maltase

  5. Sucrase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  1. Pepsin is produced in the stomach and is one of the main digestive enzymes, which helps in digestion of the proteins in food. Zymogenic cell or peptic cell is a cell in the stomach that releases pepsinogen and chymosin.
  2.  The inactive pepsinogen, on exposure to hydrochloric acid, gets converted to the active enzyme pepsin, the proteolytic enzyme of the stomach. Pepsin converts proteins into proteoses and peptones (peptides). 
  3. Pepsin hydrolyses proteins to polypeptide chains and initiates protein digestion  Hence, the protein-digesting enzyme is pepsin.
So, the correct answer is 'pepsin'.
Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine mechanism of digestion

I. Amylase
II. Lipase
III. Pepsin
IV. Trypsin

Out of the aforementioned enzymes, the protein-digesting enzymes are

  1. I and II.

  2. I and III.

  3. II and III.

  4. II and IV.

  5. III and IV.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Protein digestive enzymes are pepsin and trypsin. They break down proteins into smaller peptides and amino acids. Pepsin is secreted by the gastric gland in the stomach where as trypsin is secreted by Pancreas.

Amylase and Lipase are other important digestive enzymes as well and they help in digestion of starch and fats respectively. Hence option E is correct.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Which is not a parasite of the human intestine ?

  1. ringworm

  2. pinworm

  3. threadworm

  4. tapeworm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
They have long round bodies and range in size. Roundworms can live in or on humans and can cause many problems. They are usually found in soil and stool and can enter the body through the mouth or direct contact with the skin. They can live in the human intestine for a very long time. They are called normal Flora.
So the correct option is 'Ringworm'.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Finger like projections present in large intestine are called _____

  1. Jejunum

  2. Colon

  3. Villi

  4. Rectum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Digestion ends in small intestine. Waste products are excreted from our body through large intestine. Excess water and salts are absorbed from intestine through muscular finger like projections called Villi.