1.

The diagram given below shows a section of a 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).

Answer»

(i) 1. Cortex 2. Medulla 3. Pelvis 4. Ureter. 

(ii) Part 2 (Medulla) has the loop of Henle of all the nephrons. So they have appearance like stripes. 

(iii) Urine, Urea. 

(iv) Nephron/Kidney tubule/Renal tubule. 

(v) 1. Ultrafiltration and 2. Selective Readsorption.



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