Advertisements
Advertisements
Question
How does pepsinogen change into its active form?
Advertisements
Solution 1
Pepsinogen is a precursor of pepsin stored in the stomach walls. It is converted into pepsin by hydrochloric acid. Pepsin is the activated in the form of pepsinogen.
Pepsinogen 
Pepsin + Inactive peptide
(Inactive) (Active)
Solution 2
The proenzyme pepsinogen, on exposure to hydrochloric acid, secreted by oxyntic cells of gastric glands gets converted into the active enzyme pepsin, the proteolytic enzyme of the stomach.
RELATED QUESTIONS
Choose the correct answer among the following:
Gastric juice contains
(i) pepsin, lipase and rennin
(ii) trypsin lipase and rennin
(iii) trypsin, pepsin and lipase
(iv) trypsin, pepsin and renin
Choose the correct answer among the following:
Succus entericus is the name given to
(i) a junction between ileum and large intestine
(ii) intestinal juice
(iii) swelling in the gut
(iv) appendix
Match column I with column II
| Column I | Column II | ||
| a | Bilirubin and biliverdin | 1 | Parotid |
| b | Hydrolysis of starch | 2 | Bile |
| c | Digestion of fat | 3 | Lipases |
| d | Salivary gland | 4 | Amylases |
Answer briefly:
How does bile help in the digestion of fats?
Describe the process of digestion of protein in stomach.
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
What would happen if HCl were not secreted in the stomach?
How does butter in your food gets digested and absorbed in the body?
Name different types of teeth and their number in an adult human.
Which of the following sphincter controls the passage of food into the stomach?
Emulsification of fats is brought about by ______.
The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?
Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?
Correct the statement given below by the right option shown in the bracket against them.
Pancreatic juice and bile are released through. (intestine- pancreatic/hepato-pancreatic duct)
How is the intestinal mucosa protected from the acidic food entering from stomach?
How are the activities of gastro-intestinal tract regulated?
A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal.
