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The Human Digestive System, Quizzes of Biology

Biology

A comprehensive overview of the human digestive system, covering key topics such as the secretion of hydrochloric acid, the breakdown of complex food components, the role of the stomach acid, the causes of diarrhea, the digestion of fat, the parts of the digestive system that do not have digestive functions, the process of nutrition, and the shape and structure of the stomach.

Typology: Quizzes

2023/2024

Available from 09/19/2024

rajjatt-sabhrwal
rajjatt-sabhrwal 🇮🇳

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Q1. Hydrochloric acid is secreted by:
1. Linings of small intesne.
2. Inner lining of stomach.
3. Pancreas.
4. Lining of liver.
1 Mark
Ans: 2. Inner lining of stomach.
Q2. The breakdown of complex components of food into simpler substances is called.
1. Digeson.
2. Nutrion.
3. Breathing.
4. Respiraon.
1 Mark
Ans: 1. Digeson.
Q3. The acid present in the stomach:
1. Kills the harmful bacteria that may enter along with the food.
2. Protects the stomach lining from harmful substances.
3. Digests starch into simpler sugars.
4. Makes the medium alkaline.
1 Mark
Ans: 1. Kills the harmful bacteria that may enter along with the food.
1 MarkQ4. Diarrhoea is caused due to:
1. Infecon.
2. Indigeson.
3. Poisoning.
4. All of the above.
Ans: 4. All of the above.
Q5. Fat is completely digested in the:
1. Stomach.
2. Mouth.
3. Small intesne.
4. Large intesne.
1 Mark
Ans: 3. Small intesne.
Q6. Read carefully the terms given below. Which of the following set is the correct combinaon of organs that do not
carry out any digesve funcons?
1. Oesophagus, Large Intesne, Rectum.
2. Buccal cavity, Oesophagus, Rectum.
3. Buccal cavity, Oesophagus, Large Intesne.
4. Small Intesne, Large Intesne, Rectum.
1 Mark
Ans: 1. Oesophagus, Large Intesne, Rectum.
Explanaon:
In the human digesve system, parts such as oesophagus, large intesne and rectum do not carry out any digesve funcons.
Oesophagus carries food from the mouth to the stomach.
Large intesne absorbs most of the water from undigested food material. Rectum is the last part of the large intesne where
undigested food is stored ll it is egested out.
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Q1. Hydrochloric acid is secreted by:

  1. Linings of small intesne.
  2. Inner lining of stomach.
  3. Pancreas.
  4. Lining of liver.

1 Mark

Ans: 2. Inner lining of stomach.

Q2. The breakdown of complex components of food into simpler substances is called.

  1. Digeson.
  2. Nutrion.
  3. Breathing.
  4. Respiraon.

1 Mark

Ans: 1. Digeson.

Q3. The acid present in the stomach:

  1. Kills the harmful bacteria that may enter along with the food.
  2. Protects the stomach lining from harmful substances.
  3. Digests starch into simpler sugars.
  4. Makes the medium alkaline.

1 Mark

Ans: 1. Kills the harmful bacteria that may enter along with the food.

Q4. Diarrhoea is caused due to: 1 Mark

  1. Infecon.
  2. Indigeson.
  3. Poisoning.
  4. All of the above.

Ans: 4. All of the above.

Q5. Fat is completely digested in the:

  1. Stomach.
  2. Mouth.
  3. Small intesne.
  4. Large intesne.

1 Mark

Ans: 3. Small intesne.

Q6. Read carefully the terms given below. Which of the following set is the correct combinaon of organs that do not carry out any digesve funcons?

  1. Oesophagus, Large Intesne, Rectum.
  2. Buccal cavity, Oesophagus, Rectum.
  3. Buccal cavity, Oesophagus, Large Intesne.
  4. Small Intesne, Large Intesne, Rectum.

1 Mark

Ans: 1. Oesophagus, Large Intesne, Rectum. Explanaon: In the human digesve system, parts such as oesophagus, large intesne and rectum do not carry out any digesve funcons. Oesophagus carries food from the mouth to the stomach. Large intesne absorbs most of the water from undigested food material. Rectum is the last part of the large intesne where undigested food is stored ll it is egested out.

Q7. Which of the following is not a part of nutrion?

  1. Digeson.
  2. Absorpon.
  3. Assimilaon.
  4. Excreon.

1 Mark

Ans: 4. Excreon.

Q8. The stomach is a thick-walled bag of shape.

  1. V-shape.
  2. U-shape.
  3. X-shape.
  4. Z-shape.

1 Mark

Ans: 2. U-shape.

Q9. The pointed teeth in the buccal cavity are called:

  1. Incisors.
  2. Canines.
  3. Premolars.
  4. Molars.

1 Mark

Ans: 2. Canines.

Q10. Denne protects which part of human teeth?

  1. Enamel.
  2. Pulp cavity.
  3. Gums.
  4. Dental cavity.

1 Mark

Ans: 2. Pulp cavity.

Q11. The swallowed food moves downwards in the alimentary canal because of:

  1. Force provided by the muscular tongue.
  2. The flow of water taken with the food.
  3. Gravitaonal pull.
  4. The contracon of muscles in the wall of food pipe.

1 Mark

Ans: 4. The contracon of muscles in the wall of food pipe. Explanaon: As soon as the food enters the food pipe, the muscles in its walls start alternate contracons and relaxaon producing a wave-iike movement called peristalc. These movements are essenal for pushing the food downwards in the alimentary canal.

Q12. Which of the following is a ruminant?

  1. Buffalo.
  2. Camel.
  3. Goat.
  4. All of these.

1 Mark

Ans: 4. All of these.

Q13. Length of small intesne is:

  1. 10.5m long.
  2. 40m long.
  3. 23.4m long.
  4. 7.5m long.

1 Mark

Ans: 4. 7.5m long.

Q14. The walls of large intesne absorb:

  1. Water.
  2. Proteins.
  3. Cellulose.
  4. Roughage.

1 Mark

  1. Fats.
  2. Proteins.
  3. All of the above.

Ans: 4. All of the above.

Q22. The enzymes present in the saliva convert:

  1. Fats into fay acids and glycerol.
  2. Starch into simple sugars.
  3. Proteins into amino acids.
  4. Complex sugars into simple sugars.

1 Mark

Ans: 2. Starch into simple sugars. Explanaon: The salivary gland present in mouth secretes saliva. It contains the enzyme amylase (ptyalin) that breaks down into simple sugars. Only about 30% starch digeson takes place in the mouth.

Q23. Grass is rich in ___________ a special kind of carbohydrate which can only be digested by ruminants.

  1. Glucose.
  2. Cellulose.
  3. Sucrose.
  4. Fructose.

1 Mark

Ans: 2. Cellulose.

Q24. Which of the following do not have teeth:

  1. Rats.
  2. Birds.
  3. Snakes.
  4. Elephants.

1 Mark

Ans: 2. Birds.

Q25. The p or front of tongue taste:

  1. Sour.
  2. Bier.
  3. Salt and sweet.
  4. All of these.

1 Mark

Ans: 3. Salt and sweet.

Q26. The set of teeth that exists in the mouth during the period from six to eight years of a human being are called.

  1. Permanent teeth.
  2. Premolar teeth.
  3. Molar teeth.
  4. Milk teeth.

1 Mark

Ans: 4. Milk teeth.

Q27. Tick the correct answer: The plant which traps and feeds on insects is:

  1. Cuscuta.
  2. China rose.
  3. Pitcher plant.
  4. Rose.

1 Mark

Ans: 3. Pitcher plant.

Q28. The largest gland in the human body is:

  1. Oesophagus.
  2. Salivary gland.
  3. Liver.
  4. Villi.

1 Mark

Ans: 3. Liver.

Q29. The finger-like projecon presents on the inner lining of small intesne is called:

  1. Villi.
  2. Stomach.
  3. Rumen.
  4. Diarrhoea.

1 Mark

Ans: 1. Villi.

Q30. The finger-like outgrowths of Amoeba helps to ingest food. However, the finger-like outgrowths of human intesne helps to:

  1. Digest the fay food substances.
  2. Make the food soluble.
  3. Absorb the digested food.
  4. Absorb the undigested food.

1 Mark

Ans: 3. Absorb the digested food. Explanaon: Villi are the finger-like outgrowths of inner surface of human intesne. Their role is to increase the surface area for rapid absorpon of digested food. However, in Amoeba, the finger-like projecons are called pseudopoida that helps it to catch food parcles and to move.

Q31. The inner walls of the small intesne have millions of small finger like projecons called

  1. Villi.
  2. Trachea.
  3. Appendix.
  4. Oesophagus.

1 Mark

Ans: 1. Villi.

Q32. Which of the following pair of teeth differ in structure but are similar in funcon?

  1. Canines and incisors.
  2. Molars and premolars.
  3. Incisors and molars.
  4. Premolars and canines.

1 Mark

Ans: 2. Molars and premolars. Explanaon: Molars and premolars perform similar funcon of chewing and grinding the food. The molars are broader and have different ridge structure than molars. The other types of teeth are: Inciors, chisel-shaped for bing and cung food. Canines, large and pointed for piercing and tearing food.

Q33. If, by chance, food parcles enter the windpipe, we feel:

  1. Hiccups and cough.
  2. Yawning.
  3. Sleep.
  4. None of these.

1 Mark

Ans: 1. Hiccups and cough.

Q34. The process of digeson taking place in grass- eang animals is called.

  1. Egeson.
  2. Ruminaon.
  3. Assimilaon.
  4. Absorpon.

1 Mark

Ans: 2. Ruminaon.

Q35. Bile juice is stored in:

  1. Liver.
  2. Pancreas

1 Mark

  1. Small intesne.
  2. Large intesne.

Ans: 4. Large intesne.

Q42. Amylase enzyme is present in:

  1. Bile juice.
  2. Saliva.
  3. Gastric juice.
  4. Pancreac juice.

1 Mark

Ans: 2. Saliva.

Q43. An amoeba ingests food with the help of:

  1. Cilia.
  2. Tentacles.
  3. Pseudopodia.
  4. Buccal Cavity.

1 Mark

Ans: 3. Pseudopodia.