the implantation bleeding occurs in the moment when the fertilized egg gets implanted into the sensitive lining of the uterus similarly the length of the bleeding could also vary from one case to the other it is possible for the bleeding to be brief and hardly noticeable
Angiotensin is a peptide hormone that causes vasoconstriction and a subsequent increase in blood pressure. It is part of the renin-angiotensin system, which is a major target for drugs that lower blood pressure. Angiotensin also stimulates the release of aldosterone, another hormone, from the adrenal cortex.
The vasoconstrictor polypeptide hormone, angiotensin II, which is released by the action of the enzyme renin. Its precursor, angiotensin I, is inactive until acted on by the angiotensin-converting enzyme, mainly in the lungs. Angiotensin II has a powerful effect on raising the blood pressure. It binds to angiotensin receptors and constricts the circular smooth muscle of blood vessel walls.