Q. No.How many times can human urine be concentrated in counter-current mechanism?
1.Four times
2.Five times
3.Three times
4.Two times
Countercurrent mechanism helps in maintenance of
1.Concentration gradient in the medullary interstitium.
2.Concentration gradient in the cortical interstitium
3.Concentration gradient in the lumen of collecting duct
4.Concentration gradient in the lumen of DCT
Kidneys is efficiently monitored and regulated by hormonal feedback mechanisms which does not involve
A. Hypothalamus
B. JGA
C. Heart
D. Liver
Osmoreceptors in the body are not activated by
(1) Changes in blood volume
(2) Body Fluid volume
(3) Body Fluid ionic concentration
(4) Temperature of the body
Hypothalamus is stimulated by osmoreceptors and make the neurohypophysis to release
(1) ADH
(2) Vasopressin
(3) Both A or B
(4) Oxytocin
ADH facilitates water reabsoption and
1. Prevent diuresis
2. Promote diuresis
3. Cause diuresis
4. Both 1 and 2
ADH cannot cause
(1) Blood pressure increase
(2) Glomerular Blood Flow increase
(3) Increase in GFR
(4) Loosening of Glomerular capillary
The JG cells are activated by
(1) A fall in Glomerular blood flow
(2) A fall in Glomerular blood pressure
(3) A fall in GFR
(4) All of these
JG cells release…….. which converts…..in…....to angiotensin I.
1. Renin, Angiotensinogen, Heart
2. Rennin, Angiotensinogen, Heart
3. Renin, Angiotensinogen, Blood
4. Renin, Angiotensin II, Blood
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