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    this happens if the proximal convoluted tubule is removed from nephron

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    Question

    Removal of proximal convoluted tubule from the nephron will result in:

    Open in App Solution

    The correct option is C More concentrated urine

    Nearly 99% of the glomerular filtrate is reabsorbed into the blood. This process takes place in the PCT, with the PCT being responsible for nearly 65% of reabsorption. If reabsorption of essential materials from the filtrate does not take place, then the filtrate will be a lot more concentrated and in effect the urine will be more concentrated. Therefore the answer is ‘more concentrated urine’. However loss of PCT from the nephron will have a more drastic effect on the body fluids and blood, because blood will lose most of its dissolved components and become severely dilute, disrupting the osmotic balance of the body.

    Function of the PCT

    Standard XII Biology

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    Removal of proximal convoluted tubule from the nephron will result in

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    Question

    Removal of proximal convoluted tubule from the nephron will result in

    A

    No change in quality and quantity of urine

    B

    No urine formation

    C

    More diluted urine

    D

    More concentrated urine

    Medium Open in App

    Updated on : 2022-09-05

    Solution Verified by Toppr

    Correct option is C)

    Correct Answer :CExplanation :

    The kidney has proximal convulated tubule which is responsible for the absorption of the material such as glucose, salts, proteins and ions such as potassium and sodium.

    If the proximal convulated tubule will be removed, it will result in malfunctioning of the kidney.

    In absence of absorption, the urine will be more diluted .

    Hence, the correct answer is C. More diluted urine

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    Removal of proximal convoluted tubule from the nephron will result inA. No change in quality and quantity of urineB. No urine formationC. More diluted urineD. More concentrated urine

    Removal of proximal convoluted tubule from the nephron will result inA. No change in quality and quantity of urineB. No urine formationC. More diluted urineD. More concentrated urine . Ans: Hint: The proximal tubule efficiently regulates the pH of th...

    Removal of proximal convoluted tubule from the nephron will result in

    A. No change in quality and quantity of urine

    B. No urine formation

    C. More diluted urine

    D. More concentrated urine

    Answer Verified 230.1k+ views 2 likes

    Hint: The proximal tubule efficiently regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; it is also responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.Complete answer:The proximal convoluted tubule(PCT) is involved in the active and passive absorption of solutes like sodium, potassium, bicarbonate, amino acids, etc. present in the filtrate and passing it into the capillaries. Due to the solute absorption, water potential is lowered in the capillaries and so, the water from the filtrate also moves across the proximal convoluted tubule into the capillaries. Therefore, the removal of the proximal convoluted tubule (PCT) will result in the formation of highly dilute(more water) urine. The PCT secretes organic acids and bases such as bile salts, oxalate, and catecholamines (waste products of metabolism). Hydrogen ions- important in maintaining acid/base balance in the body. H+ secretion allows reabsorption of bicarbonate via the use of the enzyme carbonic anhydrase. PCT absorbs some of the solutes completely and others partially; i.e., there is a separation of substances that must be retained from those due for rejection. Subsequently, the loop of Henle, distal convoluted tubule(DCT), and collecting ducts are mainly concerned with the conc. of urine to provide control of water and electrolyte balance.So, the correct answer is D.Note: The 1st part is called the proximal convoluted tubule (PCT) due to its proximity to the glomerulus. The second part is called the loop of Henle, or nephritic loop because it forms a loop with descending and ascending limbs that goes from the renal medulla.

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