Question

Fill in the blanks
11.
The inner surface area of the small intestine is increased for the more affective absorption because of
12. Small amounts of chyme is pushed into the duodenum, simultaneously forcing most of it back into the
stomach. This phenomenon is called
13. Inner layer of the digestive canal is protected by the harmful effect of HCl by
14. Emulsification in digestive system is due to presence of
15. Sphincter that is present between the stomach and duodenum is _
One word answers :
16. Which sphincter helps in the expulsion of stool ?
A.
17. Name the hormone that stimulates stomach to secrete gastric juice.
A.
18. Whose experiments revolutionished the concepts of digestion ?
A.
19. If our teeth arrangement ratio is 2:1:2:3, in this one (i) shows which type of teeth?
20. Mention the name of the process that is useful for rumination in domestic animals like cow and buffalo,​

Answer 1

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Answer 2

11. Villus (pl. Villi)

12. Peristalsis

13. Mucous membrane or mucosa

14. Bile juice

15. Pyloric sphincter

16. External anal Sphincter

17. Gastrin

18. William Beaumont

19. Permanent teeth

20. Regurgitation

Explanation:

11. The finger-like projection in the intestines is called villi. they increase the surface area of absorption in the intestines.

12. The involuntary contraction and relaxation of the circular muscles in the alimentary canal cause the food to go down the canal starting from the pharynx. This movement is called Peristalsis.

13. The inner layer of the digestive tract is protected from the corrosive acid HCl by the mucous membrane or the mucosa. The mucous is secreted by the goblet cells or mucous cells in the alimentary canal.

14. The bile salts present in the bile juice released by the liver causes the fat droplets to break down into even smaller droplets by reducing the surface tension of the fat droplets, which are absorbed in the intestine. The breaking down of fat into small droplets is called emulsification.

15. The sphincter that is present between the stomach and duodenum is called Pyloric Sphincter.  

16. The External Anal Sphincter helps the expulsion of stool.

17. the hormone Gastrin, released by the gastrin cells present in the pyloric region of the stomach, stimulates the stomach to release gastric juices.

18. William Beaumont is called the father of Gastric physiology because of his contribution to understanding digestion.

19. The presence of the three molar teeth shows that these are the set of permanent teeth in an adult.  

20. Regurgitation is the process by which animals like cows and buffaloes bring out the previously ingested food for chewing.