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प्रश्न
Give biological reasons for the following statements: There is frequent urination in winter than in summer
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उत्तर
In winter, our body does not need to store much water because the outside temperatures are low. Also, very less amount of water is lost through perspiration during winter. Hence, urination is more frequent in winter than in summer.
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संबंधित प्रश्न
The diagram given alongside shows a section of a human kidney. Study the diagram carefully and answer the questions that follow:
- Label the parts numbered 1 to 4.
- Why does part 2 have a striped appearance?
- What is the fluid that passes down part 4? Name the main nitrogenous waste present in it.
- Mention the structural and functional units of kidneys.
- Name the two major steps in the formation of the fluid mentioned in (c).
Name a waste gas released by the plants only during the night time.
What are the methods used by plants to get rid of their waste products?
In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
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The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person’s life, the blood from an artery in the person’s arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person’s blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation. |
- What are organs A?
- Name the waste substance B.
- What are (i) E, and (ii) F?
- Name G, H and I.
- What is the process described above known as?
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
Explain in your own words with suitable examples.
How is excretion in plants useful to human beings?
Name the Following
The term used for Bowman’s capsule and glomerulus together.
Name the organs that store and release the urine.
