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If the PCT that is lined by simple cuboidal brush-border epithelium is cut from a nephron, how will it affect the process of urine formation?
(a)Urine will be more dilute.
(b)Facultative reabsorption of and water will not take place.
(c)Selective secretion of will not occur.
(d)Counter-current mechanism will stop, and filtrate will remain isotonic.

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Important Questions on Excretory Products and Their Elimination
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Renin is released from Juxtaglomerular apparatus in response to

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(i) Towards the centre of the inner concave surface of the kidney is a notch called ___(1)___ through which ureters, blood vessels and nerves enter.
(ii) The medulla of the kidney is divided into a few conical masses called ___(2)___ projecting into the ___(3)___.
(iii) Glomerulus is a tuft of capillaries formed by the ___(4)___ artery. Blood from the glomerulus is carried away by an ___(5)___ arteriole.
Which one of the following options correctly fills the blanks in given statements?

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