When Jarin drank a lot of water before going to the doctor, it is possible that his blood pressure will be low. It is because drinking water helps lower blood pressure for it helps eliminate unwanted elements in the body that contributes to increasing a person's blood pressure.
Renin. Renin is a hormone that is produced by the kidneys and it acts to elevate the blood pressure. ... Angiotensin II causes blood vessels to constrict, which raises the blood pressure. It also causes the kidneys to retain more sodium and water, which raises the volume of the blood
In humans, dehydration in a significant loss of water in the body and there’s extreme side affects. But in general, dehydration is the loss or removal of water