ZOOLOGY NOTES -PAGE 3
HUMAN DIGESTIVE SYSTEM
1. Name the substance that is produced by digestive glands to aid in digestion
Ans: Enzymes
2. Name the glands that secrete saliva.
Ans: Exocrine glands: parotid, the submandibular and the sublingual
3. How much saliva is secreted daily in humnas?
1000 to 1500ml
4. Name the organic substances that contain in Saliva
Ans: amylase and mucin
5. Name the substance that converts cooked starch into the disaccharide, maltose.
Ans: amylase
6. Name the glycoprotein that helps in the lubrication of food
Ans: Mucin
7. What is the term given to the lubricated, swallowable form of food?
Ans: the bolus
8. Name the waves of contraction in the muscle layer surrounding a tube in oesophagus.
Ans: peristaltic waves
9. How much time does one peristaltic wave in the oesophagus takes to reach the stomach?
Ans: 9 seconds
10. How many glands are involved in producing gastric juice?
Ans: 40 million glands
11. Which glands are found lining the inner wall of the stomach?
Ans: gastric glands
12. Which cells produce HCl in the stomach?
Ans: parietal cells (Oxyntic cells)
13. Name two enzymes of the stomach.
Ans: pepsin and rennin
14. In which form pepsin is secreted in the stomach?
Ans: pepsinogen
15. Name the acid that converts pepsinogen into pepsin.
Ans: HCl
16. Name the enzyme that converts milk protein caseinogen into insoluble casein.
Ans: Rennin
17. Name the form in which food leaves the stomach and enters the upper small intestine.
Ans: Chyme
18. What is the length of small intestine?
Ans: 5-7 metres
19. What are the three segments of small intestine?
Ans: the duodenum, the jejunum and the ileum
20. Which is the shortest segment of small intestine?
Ans: the duodenum
21. Which is the longest segment of small intestine?
Ans: the ileum
22. Name the sphincter that located at the junction of stomach and duodenum, which regulates movement of chyme.
Ans: pyloric sphincter
23. What are the three juices that mix with food in the small intestine?
Ans: bile juice, pancreatic juice and intestinal juice
1. Name the substance that is produced by digestive glands to aid in digestion
Ans: Enzymes
2. Name the glands that secrete saliva.
Ans: Exocrine glands: parotid, the submandibular and the sublingual
3. How much saliva is secreted daily in humnas?
1000 to 1500ml
4. Name the organic substances that contain in Saliva
Ans: amylase and mucin
5. Name the substance that converts cooked starch into the disaccharide, maltose.
Ans: amylase
6. Name the glycoprotein that helps in the lubrication of food
Ans: Mucin
7. What is the term given to the lubricated, swallowable form of food?
Ans: the bolus
8. Name the waves of contraction in the muscle layer surrounding a tube in oesophagus.
Ans: peristaltic waves
9. How much time does one peristaltic wave in the oesophagus takes to reach the stomach?
Ans: 9 seconds
10. How many glands are involved in producing gastric juice?
Ans: 40 million glands
11. Which glands are found lining the inner wall of the stomach?
Ans: gastric glands
12. Which cells produce HCl in the stomach?
Ans: parietal cells (Oxyntic cells)
13. Name two enzymes of the stomach.
Ans: pepsin and rennin
14. In which form pepsin is secreted in the stomach?
Ans: pepsinogen
15. Name the acid that converts pepsinogen into pepsin.
Ans: HCl
16. Name the enzyme that converts milk protein caseinogen into insoluble casein.
Ans: Rennin
17. Name the form in which food leaves the stomach and enters the upper small intestine.
Ans: Chyme
18. What is the length of small intestine?
Ans: 5-7 metres
19. What are the three segments of small intestine?
Ans: the duodenum, the jejunum and the ileum
20. Which is the shortest segment of small intestine?
Ans: the duodenum
21. Which is the longest segment of small intestine?
Ans: the ileum
22. Name the sphincter that located at the junction of stomach and duodenum, which regulates movement of chyme.
Ans: pyloric sphincter
23. What are the three juices that mix with food in the small intestine?
Ans: bile juice, pancreatic juice and intestinal juice
- Zoology
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- Zoology Notes- Page 1- Nutrition
- Zoology Notes- Page 2- Balanced Diet
- Zoology Notes- Page 3- Human Digestive System
- Zoology Notes- Page 4- Human Respiration
- Zoology Notes- Page 5- Genetics