61. External sphincter of male urethra in human being is found in

A Penile urethra
B Membranous part
C Prostatic part
D External urethral orifice.
Answer :   Membranous part
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62. Which of the following is metabolic waste of protein metabolism

A NH3, urea and CO2
B Urea, oxygen and N2
C Urea , ammonia and alanine
D Urea ammonia and creatinine
Answer :   NH3, urea and CO2
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63. Which one of the following blood vessel in mammals contains least amount of urea

A Hepatic portal vein
B Hepatic vein
C Dorsal aorta
D Renal vein
Answer :   Renal vein
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64. ADH controls water permeability of

A Collecting tube (distal part)
B Proximal convoluted tuble
C Distal convoluted tuble (distal part)
D All of the above
Answer :   Distal convoluted tuble (distal part)
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65. Which of the following is not a function of kidneys

A Regulation of blood pressue
B Removal of urea
C Regulation of acidity of fluids
D Secretion of antibiotics
Answer :   Secretion of antibiotics
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66. The principal nitrogenous excretory compound in humans is synthesised

A in kidneys but eliminated mostly through liver
B in kidneys as well as eliminated by kidneys
C in liver and also eliminated by the same through bile
D in the liver, but eliminated mostly through kidneys
Answer :   in the liver, but eliminated mostly through kidneys
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67. Ornithine cycle was discovered by

A Kreb and kornberg
B Hans kreb
C Kreb and Henseleit
D O2 concentration increases
Answer :   Kreb and Henseleit
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68. Pyramids in kidney of man are

A 4
B 6
C 7
D 12
Answer :   12
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69. One of the following is impermeable to H2O normally

A PCT
B DCT
C Descending limb
D All of the above
Answer :   DCT
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70. Blood dialysis is called

A Artificial lung
B Artificial kidney
C Artificial heart
D Artificial brain
Answer :   Artificial kidney
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