Excretory Products and their Elimination


  1. Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule?









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    Aldosterone hormone, released by the adrenal glands, helps the body regulate blood pressure. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood. This increases the volume of fluid in the body, which also increases blood pressure.

    Correct Option: A

    Aldosterone hormone, released by the adrenal glands, helps the body regulate blood pressure. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood. This increases the volume of fluid in the body, which also increases blood pressure.


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









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    Gnerally all of the essential nutrients and 70% to 80% of electrolytes and water are reabsorbed by this segment. Removal of proximal convolnted tubule from the nephron will result in dilution of urine.

    Correct Option: D

    Gnerally all of the essential nutrients and 70% to 80% of electrolytes and water are reabsorbed by this segment. Removal of proximal convolnted tubule from the nephron will result in dilution of urine.



  1. Human urine is usually acidic because:









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    Urine has acidic nature because hydrogen ions(H+) are components of an acid which are secreted into the filtrate.

    Correct Option: C

    Urine has acidic nature because hydrogen ions(H+) are components of an acid which are secreted into the filtrate.


  1. Which of the following does not favour the formation of large quantities of dilute urine?









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    The secretion of Renin is induced by decrease in blood pressure and blood volume. It maintains the proper BP and BV. It has no role in the formation of large quantities of urine.

    Correct Option: B

    The secretion of Renin is induced by decrease in blood pressure and blood volume. It maintains the proper BP and BV. It has no role in the formation of large quantities of urine.



  1. The maximum amount of electrolytes and water (70 - 80 percent) from the glomerular filtrate is reabsorbed in which part of the nephron?









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    Nearly all the essential nutrients, and 70-80 percent of electrolytes and H2O are reabsorbed by proximal convoluted tubules.

    Correct Option: C

    Nearly all the essential nutrients, and 70-80 percent of electrolytes and H2O are reabsorbed by proximal convoluted tubules.