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प्रश्न
Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.
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उत्तर
The layer marked in the diagram represents glandular epithelium of mucosa.
Significance of the glandular epithelium of mucosa:
Goblet cells of the epithelial layer of a mucous membrane secrete mucus which lubricates the lumen of the alimentary canal. This helps in movement of food through the gastrointestinal tract.
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संबंधित प्रश्न
What is the function of enzymes in the human digestive system?
Which part of alimentary canal receives bile from the liver?
Name the substance whose build up in the muscles during vigorous physical exercise may cause cramps.
Which one of the following pairs of types of teeth perform one common function as stated against it?
List two different functions performed by the pancreas in our body.
Fill in the blank.
In an adult human, there are a total of ___ teeth.
Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).
| Digestive Enzymes | Acts on | To convert into |
| (i) Pepsin | _________(2) | ________(3) and |
| (ii) _______(1) | Fats |
________(4) _________(5) |
Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.
Fill in the blank.
Saliva contains salivary amylase which changes starch to _____.
Write true or false for the below statement. Rewrite the false statements correctly.
Water is absorbed in large intestine
Write short answers
Write the names of three enzymes which are found in pancreatic juice.
Correct the spellings: Ptorein
Name the enzymes secreted by the following: Ileum
The question has four options. Choose the correct answer:
Parotid salivary glands occur
The process of digestion starts from the ______.
Who is telling a lie?
Tongue: My taste-buds can tell only a sweet taste.
Analogy
Enzymes: Digestive glands:: _______: Endocrine glands.
Describe the alimentary canal of man
A calcified connective tissue from which the basic shape of the tooth is derived is known as ______.
All are functions of the liver, EXCEPT
______ is the common passage of air and food.
Match the two columns and select correct option.
| Column - I | Column - II | ||
| i. | Sphincter of Oddi | a. | Oesophagus and stomach |
| ii. |
Ileo-caecal sphincter |
b. | Stomach and small intestine |
| iii. | Pyloric sphincter | c | Ileum and caecum |
| iv. |
Gastro-oesophageal sphincter |
d. | Opening of hepato- pancreatic duct |
(i)______ and (ii)______ form the common bile duct.
What is digestion?
What is the significance of the emulsification of fats?
Name the correct substrates for the following enzymes
- Trypsin
- Amylase
- Pepsin
- Lipase
Following statements describe animal nutrition. Read the statement and give one word for the statement. Write the terms that describe process.
Breaking of complex food substances into simpler and soluble substances.
Read the following passage carefully and answer the questions that follow it.
| Bile juice is stored in a sac called, gall bladder, located near its organ of secretion, liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas. |
- Which organ secretes the bile juice?
- Why is digestion of fats difficult as compared to that of other nutrients?
- How does bile juice help in the digestion of fat?
- Where is the digestion of fat completed?
- Does bile juice digest fat completely?
