PrepBharat

1. Which segment helps in the pH maintenance of body fluid?
a) PCT
b) DCT
c) Collecting duct
d) All

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2. DCT helps in
(A) Conditional reabsorption of \[Na^{+}\] and water
(B) \[HCO_3^-\] absorption
(C) pH maintenance
(D) Selective secretion of \[H^{+}\] and \[K^{+}\]
a) A, C and D only
b) B, C and D only
c) All of these
d) C and D only

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3. Which of the following segment allows the passage of small amount of urea into modularly interstitium to keep up the osmolarity?
a) PCT
b) HL
c) DCT
d) Collecting duct

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4. At which place we initially used the term ‘urine’ for filtrate?
a) PCT
b) HL
c) DCT
d) Collecting duct

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5. Counter-current mechanism is present in
a) HL
b) Vasa recta
c) Both (a) and (b)
d) DCT

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6. Which of the following is incorrect about counter-current mechanism?
a) The flow of filtrate in two limbs of vasa recta is in opposite direction.
b) The flow of blood in two limbs of vasa recta is also in opposite direction.
c) NaCI is transported by the ascending limb of HL which is exchanged with the descending limb of vasa recta.
d) NaCI is returned to in interstitium by the ascending portion of vasa recta.

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7. Counter current mechanism maintains the concentration gradient in the medullary interstitium. It helps in
a) Easy passage of water from PCT
b) Easy passage of water from DCT
c) Easy passage of water from HL
d) Easy passage of water from collecting duct

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8. The total filtrate formed in 24 hours in human kidney is
a) 1.8 litre
b) 8.0 litre
c) 18 litre
d) 180 litre

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9. Which of the following is most likely to cause an increase in the glomerular filtration rates?
a) Blockage of ureter
b) Dilation of the afferent arterioles
c) Release of renin from the juxtaglomerular apparatus
d) Volume depletion

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10. Which of these will be completely reabsorbed from glomerular filtrate under normal conditions in the nephrons?
a) Urea
b) Salts
c) Uric acid
d) Glucose

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