1.Conclusion: The changes of circadian variation of blood pressure are associated with the role of sympathetic nerve and intracardial renin angiotensin system.
2.Renin, a proteolytic enzyme formed in the granules of the juxtaglomerular apparatus cells, catalyzes conversion of the protein angiotensinogen to angiotensin I, a decapeptide.
3.This system begins with your liver releasing angiotensinogen, and, after a series of steps that you can read about in an endocrinology textbook, angiotensin I is produced.
4.Your kidneys cook up hormones like renin and angiotensin which help regulate levels of sodium and fluids in your body, and also help expand and constrict blood vessels.
5.Along the same lines, drugs that reduce the effect of aldosterone can also cause hyperkalemia, and these are drugs like renin inhibitors, ACE inhibitors, angiotensin II receptor antagonists, selective aldosterone blockers, and potassium-sparing diuretics.