NEETZoologyExcretory Products and their Elimination
What is the effect of ANF on blood vessels?
Options
- AConstricts
- BDilates
- CNo effect
- DInhibits
Correct answer
B. Dilates
Step-by-step solution
he JGA plays a complex regulatory role. A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin which converts angiotensinogen in blood to angiotensin I and further to angiotensin II. Angiotensin II, being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR. Angiotensin II also activates the adrenal cortex to release Aldosterone. Aldosterone causes reabsorption of Na+ and water from the distal parts of the tubule. This also leads to an