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प्रश्न
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उत्तर
Water is necessary for our body because:
(i) Water acts as a solvent for many organic and inorganic compounds
(ii) Water facilitates the movement of food materials, waste products, and other chemical substances in the cytoplasm and circulatory process.
(iii) It plays an important role in regulating body temperature and osmotic pressure of the body fluids.
(iv) Water serves as a good medium for various metabolic reactions.
संबंधित प्रश्न
Fill in the blank:
Animal starch stored in the muscle and liver is ______.
Name the sources of the following:
Sucrose
The process of intake of food and utilising it for all life processes is called ______.
All the substances in our food which are useful for various bodily processes are called ______.
Spot the following in the table of vitamins and minerals.
Vitamins/minerals present in milk.
Short Answer Type Questions:
Write the functions of water in our body.
Complete the analogy:
Ptyalin : Amylase :: Pepsin : ................. .
Observe the diagram given as Figure and label the following terms given in the box.
| stomatal opening, guard cell |
______ is stored in our liver and muscles.
Take a potted plant with broad leaves. Take two strips of black paper and cut out a small square in the centres. Cover a part of two leaves with these papers and secure them with paper clips Figure. Keep the plant in sunlight for 2–5 days. Observe the difference in the colour of the covered and the uncovered portions on the leaf. Perform iodine test on this leaf. Did the two parts show different results? Now take second leaf. Remove the strip and expose the covered part to the sunlight for 2–3 days and do the iodine test again. Describe your observations.
