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  4. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/c0c858c6641e33dd54eaa9db447c9982-.png /> In the given diagram, water absorption does not occur in part labelled a s .

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In the given diagram, water absorption does not occur in part labelled a s_______ .

Excretory Products and their Elimination

Solution:

$W$ represents the glomerulus where ultrafiltration occurs. It is permeable to water and low molecular weight substances. Water is reabsorbed by osmosis in $PCT, DCT\, (Z)$ and descending limb of loop of Henle $(X)$ except ascending limb of loop of Henle $(Y)$.