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प्रश्न
The stomach secretes gastric juice, which contains hydrochloric acid. What is its function?
उत्तर
Functions of hydrochloric acid:
(1) It gets mixed with food and kills the bacteria present in food.
(2) It activates pepsin to act on proteins.
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संबंधित प्रश्न
Define holozoic nutrition. Give one example
The first enzyme to mix with food in the digestive tract is:
(a) pepsin
(b) cellulose
(c) amylase
(d) trypsin
Put a tick (✓) against the most appropriate alternative in the following statement.
The teeth which help in tearing the food are the:
Fill in the blanks.
Grinding of food is brought about by _______ and ______
Fill in the blanks.
Removal of undigested food is called ________.
Circle the odd one.
______ is the common passage of air and food.
The digestive glands associated with the alimentary canal are ______.
Solve the crossword given in Figure 2.3.
| Across | Down | ||
| 1 | Cream-coloured digestive gland | 2 | Feeds with the help of pseudopodia |
| 3 | Undigested excretory solid residues | 6 | Total number of molars in one jaw of an adult |
| 4 | Organ that mixes saliva with the food | 8 | Largest gland |
| 5 | Point of defecation | 9 | Watery secretion in the mouth |
| 7 | Stored in gall bladder | 11 | A ruminant |
| 10 | Finger-like outgrowth in the small intestine | 12 | Form of food chewed by ruminants |
| 13 | Kind of taste buds | ||
| 14 | Kills bacteria in the stomach | ||
Curdling of milk protein is done by ______.
