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प्रश्न
Why is excretion necessary in living beings?
उत्तर
The excretion is necessary because the toxic products if allowed to be retained in the body act as poison and cause great harm to the body. If they exceed the threshold, they may even cause death.
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संबंधित प्रश्न
Name a waste gas released by the plants only during the night time.
Name the two waste products of the human body which are produced in the body cells.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1 to 8 are as follows:
1. Afferent arteriole from renal artery
2. efferent arteriole
3. Bowman’s capsule
4. Glomerulus;
5. Proximal convoluted tubule with blood capillaries;
6. Distal convoluted tubule with blood capillaries;
7. collecting tubule;
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where does ultrafiltration take place?
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
Describe in brief how urine is produced in the human body.
Name the Following
The branch of renal artery which enters into Bowman’s capsule.
Complete the following sentence with appropriate word:
______ is the functional unit of kidney.
Write the functional activity of the following structure: Renal vein
The number of ATP molecules required to produce one molecule of urea from the omithine cycle.
Give two examples of the following:
Nitrogenous waste
