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प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
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उत्तर
(i)
1 – Cortex
2 – Medulla
3 – Pelvis
4 – Ureter
(ii) Medulla is composed of a striped substance arranged in several pyramids. Hence, the medulla (2) has a stripped appearance.
(iii) Urine passes down part ‘4’, i.e. ureter. The main nitrogenous substance present in it is urea.
(iv) Nephrons are the structural and functional units of the kidneys.
(v) The two major steps in the formation of urine are ultrafiltration and selective reabsorption.
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संबंधित प्रश्न
Name the Following
The organ which produces urea.
What does the bladder in our body do?
The substance which is not reabsorbed into the blood capillaries surrounding the tuble of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Urine is devoid of blood cells.
Name the following:
The outer region of kidney containing the Bowman's capsule.
One of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir.
Skin, liver, lungs, kidneys, excretion.
Write the functional activity of the following structure: Aldosterone
The tadpole of frog lives in water, hence its mode of excretion is ______.
What would happen if green plants disappeared from earth?
Identify the correct labels for A and B in the following diagram
