Bicarbonate is not reabsorbed by

  • PCT

  • DCT

  • Henle's Loop

  • All of these

Selective secretion of which of the following ions does not take place in PCT?

  • Hydrogen ions

  • Ammonia

  • Potassium ions

  • Chloride ions

Reabsorption is the minimum of which of the following segments of tubule?

  • Ascending limb

  • PCT

  • DCT

  • Descending limb

The maintenance of high osmolarity of medullary interstitial fluid is due to-

  • Henle's loop

  • PCT

  • DCT

  • Collecting Duct

Which of the following option is completely permeable to water and impermeable to electrolytes?

  • Descending limb of the loop of Henle

  • Ascending limb of loop of Henle

  • Loop of Henle

  • DCT

Which of the following option is impermeable to water but permeable to electrolytes?

  • Descending Limb of the loop of Henle

  • Ascending limb of loop of Henle

  • Loop of Henle

  • DCT

The concentrated filtrate gets diluted due to

  • Passage of electrolytes to the medullary fluid

  • Passage of water to the inner side of tubules

  • Passage of both water and electrolytes to the inner side of tubule

  • Both A and B

Conditional reabsorption of sodium and water takes place in which of the following segments?

  • PCT

  • DCT

  • AL of LOH

  • DL of LOH

Which of the following does not get selectively secreted by DCT cells?

 

  • K+

  • H+

  • Ammonia

  • Carbonate

Which segment allows the passage of small amounts of urea into the medullary interstitium to keep up the osmolarity?

 

  • PCT

  • DCT

  • LOH

  • Collecting Duct

Which of the following organisms have the capacity to concentrate urine?

 

  • Mammals

  • Fishes

  • Reptile

  • Amphibians

Which of the following is the correct way of writing the unit of osmolarity?

 

  • Mosmo/L

  • mOsmol/L

  • MOsmo/L

  • mOSMol/L

The gradient is mainly caused by

 

  • NaCl

  • Urea

  • Both A and B

  • Ammonia

The NaCl is transported by the ascending limb of Henle's loop which is exchanged with the…….

 

  •    Ascending limb of vasa recta

  •    Descending limb of vasa recta

  •    Ascending limb of LOH

  •    Descending limb of LOH

NaCl is returned to the interstitium by

 

  • Ascending portion of LOH

  • Ascending portion of vasa recta

  • Descending portion of LOH

  • Descending portion of vasa recta

Urea will enter the

 

  • Thin segment of AL of LOH

  • Thick segment of AL of LOH

  • Descending Limb of LOH

  • All of these

Urea is transported back to the interstitium by

 

  • Collecting Tubule

  • DCT

  • PCT

  • LOH

How many times can human urine be concentrated in counter-current mechanism?

  • Four times

  • Five times

  • Three times

  • Two times

Countercurrent mechanism helps in maintenance of

 

  • Concentration gradient in the medullary interstitium.

  • Concentration gradient in the cortical interstitium

  • Concentration gradient in the lumen of collecting duct

  • Concentration gradient in the lumen of DCT

Kidneys is efficiently monitored and regulated by hormonal feedback mechanisms which does not involve

  • A. Hypothlamus
  • B. JGA
  • C. Heart
  • D. Liver

Osmoreceptors in the body are not activated by

  • Changes in blood volume

  • Body Fluid volume

  • Body Fluid ionic concentration

  • Temperature of the body

Hypothalamus is stimulated by osmoreceptors and make the neurohypophysis  to release

  • ADH

  • Vasopressin

  • Both A or B

  • Oxytocin

ADH facilitates water reabsoption and

  • Prevent diuresis

  • Promote diuresis

  • Cause diuresis

  • Both A and B

ADH has no effects over

  • Latter parts of tubules

  • Kidney

  • Blood vessels

  • Liver

ADH cannot cause

  • Blood pressure increase

  • Glomerular Blood Flow increase

  • Increase in GFR

  • Loosening of Glomerular capillary

The JG cells are activated by

  • A fall in Glomerular blood flow

  • A fall in Glomerular blood pressure

  • A fall in GFR

  • All of these

JG cells release…….. which converts…..in…....to angiotensin I.

  • Renin, Angiotensinogen, Heart

  • Rennin, Angiotensinogen, Heart

  • Renin, Angiotensinogen, Blood

  • Renin, Angiotensin II, Blood

Which of the following is a powerful vasoconstrictor?

  • Angiotensinogen

  • Angiotensin I

  • Angiotensin II

  • Rennin

Angiotensin II has effects over

  • Adrenal medulla

  • Adrenal cortex

  • Blood vessels

  • Both B and C

Aldosterone causes reabsoption of

  • Na+

  • Water

  • Na+ and water

  • Na+, urea, water

0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Zoology Quiz Questions and Answers