Excretory Products and their Elimination


  1. Ureters act as urogenital ducts in









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    In male frogs the sperms are carried through the ureters, hence in male, ureters are called urinogenital ducts.

    Correct Option: D

    In male frogs the sperms are carried through the ureters, hence in male, ureters are called urinogenital ducts.


  1. Which one of the following statements in regard to the excretion by the human kidneys is correct?









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    Urine formation involves three main process called, glomerular filtration, reabsorption and secretion. A comparison of the volume of the filtrate formed per day (which is 180 litres per day) with that of urine released (about 1.5 litres) suggest that nearly 99 percent of the glomerular filtrate is resorbed by the renal tubules. The descending limb of loop of Henle is permeable to water but impermeable to electrolytes.
    The ascending limb is impermeable to water but allows transport of electrolytes.
    Reabsorption of sodium ions and water takes place in distal convoluted tubule. Also, it is capable of reabsorption of HCO3.

    Correct Option: C

    Urine formation involves three main process called, glomerular filtration, reabsorption and secretion. A comparison of the volume of the filtrate formed per day (which is 180 litres per day) with that of urine released (about 1.5 litres) suggest that nearly 99 percent of the glomerular filtrate is resorbed by the renal tubules. The descending limb of loop of Henle is permeable to water but impermeable to electrolytes.
    The ascending limb is impermeable to water but allows transport of electrolytes.
    Reabsorption of sodium ions and water takes place in distal convoluted tubule. Also, it is capable of reabsorption of HCO3.



  1. What will happen if the stretch receptors of the urinary bladder wall are totally removed?









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    Sensory stretch receptors are responsible for the stretch reflex. If these are removed then autonomic nervous system control will not be there and micturition will continue. Micturition is the expulsion of urine from the urinary bladder.

    Correct Option: A

    Sensory stretch receptors are responsible for the stretch reflex. If these are removed then autonomic nervous system control will not be there and micturition will continue. Micturition is the expulsion of urine from the urinary bladder.


  1. A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of:









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    Under fasting conditions and in uncontrolled diabetes, the liver produces large amount of ketone bodies like Acetoacetate, dihydroxy butyrate. The presence of excess ketone bodies in blood or urine is termed ketonemic and ketonuria respectively.

    Correct Option: D

    Under fasting conditions and in uncontrolled diabetes, the liver produces large amount of ketone bodies like Acetoacetate, dihydroxy butyrate. The presence of excess ketone bodies in blood or urine is termed ketonemic and ketonuria respectively.



  1. The basic functional unit of the human kidney is









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    Nephridia are the excretory structures of annelids. Henle's loop is a part of the nephron or uriniferous tubule of the vertebrate kidney.

    Correct Option: A

    Nephridia are the excretory structures of annelids. Henle's loop is a part of the nephron or uriniferous tubule of the vertebrate kidney.