1.

Study the diagram given below and then answer the questions that follow :(i) Name the region is the kidney where the above structure is present ? (ii) Name the parts labelled 1, 2, 3 and 4. (iii) Name the stages involved in the formation of urine (iv) What is the technical term given to the process occurring in 2 and 3 ? Briefly describe the process.

Answer»

(i) Cortex 

(ii) 1 – Afferent arteriole 

2 – Glomerulus 

3 – Bowman’s capsule 

4 – Efferent arteriole 

(iii) Ultrafiltration Selective reabsorption Tubular secretion 

(iv) Ultrafiltration. Blood rich in nitrogenous waste and excess water enters Bowmans Capsule through a wider afferent arteriole then splits into fine capillaries called glomerulus due to which a hydrostatic pressure is created. This pressure leads to filtration of water with nitrogenous wastes.



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