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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
A dialysis machine contains long tubes coiled in a tank containing dialysing solution:
What does the dialysing solution contain?
Name the main nitrogenous waste in the human blood. How is it removed from the blood?
Explain the principle of dialysis with the help of a labelled diagram.
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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?
Write down the functional activity of the following parts,
Renal artery ………………
Define the following term :
Renal pelvis
Label the diagram given below :
Differentiate between:
Ureter and Urethra.
Give a technical term:
The duct which transports urine from the kidney to the urinary bladder.
Complete the following sentence with appropriate words:
The outer surface of the kidney is ______ while the inner surface is ______.
