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प्रश्न
Give Scientific reasons:
Consuming iodized salt in day to day diet is essential.
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उत्तर
Consuming iodised salt in day to day diet is essential.
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संबंधित प्रश्न
Which part of the body secretes bile? Where is bile stored? What is the function of bile?
An enzyme secreted by gastric glands in stomach which acts on proteins.
Which part of alimentary canal receives bile from the liver?
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine
When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then from its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache.
(a) What are (i) organisms A, and (ii) substance B?
(b) What are (i) part C, and (ii) part D, of tooth known as?
(c) By what name are the holes E in the tooth known?
(d) Name the part F of the tooth.
(e) What will happen if organisms A reach part F of the tooth known?
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.
What are the main characteristics of enzyme?
Fill in the blanks.
The ______ and ______ are used for crushing and grinding the food.
Fill in the blank.
The human teeth appear in two sets, the first set is called primary which consists of only _______ teeth
Write true or false for the below statement. Rewrite the false statements correctly
Pancreatic juice does not contain any enzyme.
Find the odd one out. Give reasons for your choice
Differentiate between
Small intestine and Large intestine
Name the enzymes secreted by the following: Stomach
The question has four options. Choose the correct answer:
Parotid salivary glands occur
The question has four options. Choose the correct answer:
Stomach in vertebrates is the chief site of digestion of
How do we know that we are hungry and that we should now eat?
Write down the explanation.
Explain why human dentition is considered as thecodont, diphydont and heterodont.
Why it is important to wear helmet while riding a bike?
Circle the odd one.
Digestion of starch begins in the ______.
Which part of the alimentary canal receives bile from the liver?
