Deliver it to the laboratory or your health care provider as soon as possible upon completion. To obtain a clean-catch sample, men or boys should wipe clean the head of the penis. Women or girls need to wash the area between the lips of the vagina with soapy water and rinse well. Then, in a clean container, catch about 1 to 2 ounces of urine and remove the container from the urine stream. Give the container to the health care provider or assistant.
Aldosterone increases the reabsorption of sodium in the kidneys.
The level of aldosterone in the plasma is indirectly controlled by the amount of sodium in plasma. I is converted to angiotensin II by an enzyme in the veins of the lungs. Angiotensin II acts on the adrenal cortex to stimulate the release of aldosterone. Aldosterone increases reabsorption of sodium and excretion of potassium in the distal tubules of the kidneys. Reabsorption of sodium is accompanied by reabsorption of water, which raises blood pressure .