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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
Give biological reasons for the following statements: There is frequent urination in winter than in summer
Write the functions of Ureter.
State whether the following statement is true or false:
Some organisms store wastes in body parts.
Where is urine carried through ureters?
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Urine is devoid of blood cells.
Answer the following in detail.
Describe the process of urine formation.
Choose the correct answer:
A condition of failure of kidney to form urea is called ____________
Write the functional activity of the following structure: Henle’s loop
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
Explain the importance of soil for plant growth.
