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प्रश्न
What bodily needs or sensations do you become aware of even though you are reading a book?
उत्तर
We become aware of our breathing and palpitations of the heart that are going on. Sometimes some weird sounds from the stomach are audible. This indicates that some digestive activity is taking place in the body.
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संबंधित प्रश्न
What is the role of saliva in the digestion of food?
Fat is completely digested in the ______.
If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.
Write true or false for the below statement. Rewrite the false statements correctly.
Digestion of food in the intestine takes place in the presence of dilute hydrochloric acid.
Define with examples: Omnivores
Match items in column A with the appropriate items in Column B:
| Column A | Column B | ||
| 1 | HCl | a | Lactose |
| 2 | Rennin | b | Pellagra |
| 3 | Enteropeptidase | c | Rumen |
| 4 | Cellulose | d | Pepsin |
| 5 | Ptyalin | e | Starch |
| 6 | Vitamin | f | Pernicious anaemia |
| 7 | Intestinal juice | g | Trypsin |
| 8 | Bile salt | h | Casein |
| 9 | Vitamin A | i | Micelle |
| 10 | Goitre | j | Night-blindness |
| k | Iodine | ||
The question has four options. Choose the correct answer:
The dental formula of human beings is
Identify the correct human dental formula.
Name the organism which lives in the digestive system of human ______.
Explain the role of the mouth in digestion of food.
