Tag: nutrition deficiency diseases

Questions Related to nutrition deficiency diseases

Main function of HCl in stomach is to

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Activates amylase enzyme

  2. Facilitate absorption of food

  3. Dissolve enzymes

  4. Activate pepsinogen to pepsin

Show answer
Correct Option: D
Explanation:

Stomach in vertebrates is the main site for digestion of proteins. Pepsin is the chief proteolytic enzyme of stomach secreted in the inactive form called as pepsinogen. The pepsinogen is activated to pepsin in presence of hydrochloric acid secreted in stomach by oxyntic or parietal cells. The optimum pH for activity of pepsin is 1.8.

Therefore, the correct answer is option D.

If the stomach did not produce any hydrochloric acid, which enzyme will not function?

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Ptyalin

  2. Trypsin

  3. Pepsin

  4. Collagenase

Show answer
Correct Option: C
Explanation:

Hydrochloric acid (HCl) converts pepsinogen to pepsin which breaks down proteins to peptides. HCl maintains a pH in the stomach of approximately 2.0. It also dissolves food and kills microorganisms. Without enough HCl, pepsinogen is no converted to pepsin which do not allow the breakdown of proteins

So, the correct answer is 'Pepsin'

Stomach in vertebrates is the main site for digestion of 

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Proteins

  2. Carbohydrates

  3. Fats

  4. Nucleic acids

Show answer
Correct Option: A
Explanation:

Stomach in vertebrates is the main site for digestion of proteins. Pepsin is the chief proteolytic enzyme of stomach secreted in the inactive form called as pepsinogen. The pepsinogen is activated to pepsin in presence of hydrochloric acid secreted in stomach by oxyntic or parietal cells. The optimum pH for activity of pepsin is 1.8.

A man sits down to eat a large steak. Concerned about heartburn, he takes several antacid tablets before eating so as to neutralize his stomach acid.
Which of the following may result from this action?

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Increased chemical digestion of the protein in the steak by the stomach.

  2. Decreased absorption of the protein in the steak by the small intestines.

  3. An increase in the peristaltic actions of the mans digestive tract.

  4. Increased urine production by the man's kidneys.

Show answer
Correct Option: B
Explanation:
  • Digestion typically begins in the stomach when pepsinogen is converted to pepsin by the action of hydrochloric acid. And continued by trypsin and chymotrypsin in the small intestine. 
  • Before the absorption in the small intestine, most proteins are already reduced to single amino acid or peptides of several amino acids. Hence, he takes several antacid tablets before eating so as to neutralize his stomach acid.
So, the correct answer is 'Decreased absorption of the protein in the steak by the small intestines'.

One of the- following is needed for the conversion of trypsinogen into trypsin  _____________.

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. HCI

  2. Enterokinase

  3. Lipase

  4. Zymase

Show answer
Correct Option: B
Explanation:

In the presence of enterokinase, inactive trypsinogen is converted into active trypsin.

So, the correct answer is 'Enterokinase'

Secretion of gastric juice is stopped by _________.

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Gastrin

  2. Pancreazymin

  3. Cholecystokinin

  4. Enterogastrone

Show answer
Correct Option: D

Which enzyme initiates protein digestion?

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Pepsin

  2. Trypsin

  3. Aminopeptidase

  4. Carboxypeptidase

Show answer
Correct Option: A

Rennin acts on ______________________.

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Milk changing casein into calcium paracaseinate at 7.2 8.2 pH

  2. Proteins in stomach

  3. Fat in intestine

  4. Milk changing casein into calcium paracaseinate at 1 3 pH

Show answer
Correct Option: D

Which pair reaches the stomach totally undigested?

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Fat, cellulose

  2. Starch, cellulose

  3. Protein, starch

  4. Starch, fat

Show answer
Correct Option: A

Which gastric secretion is correctly matched with its source

parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

  1. Pepsin Chief cells

  2. Chymotrypsin Parietal cells

  3. HCl Goblet cells

  4. Mucus Oxyntic cells

Show answer
Correct Option: A