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 Multiple Choice QuestionsMultiple Choice Questions


The ornithine cycle removes two waste products from the blood in the liver. These products are

  • CO2 and urea

  • ammonia and urea

  • CO2 and ammonia

  • ammonia and uric acid


Match the items given in Column I with those in Column II and select the correct option given below:

Column I Column II
Function Part of the Excretory system
a Ultrafiltration i Henle's loop
b Concentration of urine ii Ureter
c Transport of urine iii Urinary bladder
d Storage of urine iv Malpighian corpuscle 
    v Proximal convoluted tubule

  • a b c d
    iv v ii iii
  • a b c d
    iv i ii iii
  • a b c d
    v iv i iii
  • a b c d
    v iv i ii


Which of the following statements is correct?

  • The ascending limb of loop of Henle is impermeable to water

  • The descending limb of loop of Henle is impermeable to water

  • The ascending limb of loop of Henle is permeable to water



Statement I. The renal fluid becomes increasingly concentrated, when it flows down in the descending limb of loop of Henle towards inner medulla, but its concentration decreases in the ascending limb, when it flows towards the cortex.

Statement II. The descending limb of the loop of Henle water is reabsorbed; the ascending limb is impermeable to water, but salts are absorbed.

  • Statement I is correct, but Statement II is incorrect

  • Statement II is correct, but Statement I is incorrect

  • Both statements are correct

  • Both statements are incorrect


Which part of the nephron is impermeable to water

  • Proximal convoluted tubule

  • Distal convoluted tubule

  • Ascending limb of loop of Henle

  • Descending limb of loop of Henle


Excretory structures in Rotifers are

  • Green glands

  • Malpighian tubules

  • Flame cells

  • Gills

  • Gills


A hormone, secreted by the endocrinal cells of duodenal mucosa which influences the releases of pancreatic juice is

  • relaxin

  • cholecystokinin

  • Secretin

  • Progesterone