Another set of salt-retaining hormones are then activated to make the kidneys retain all the salt, and things return to normal.

This is like the kidneys cleaning out toxins, but retaining blood cells.

Aldosterone, in turn, causes the kidneys to retain fluids and the woman to suddenly gain a few water-filled pounds.

Lisinopril causes the kidneys to retain potassium, which may lead to hyperkalemia.

Some such drugs work by allowing the kidneys to retain more sodium; others block the body's response to adrenaline.

The mineralocorticoids, such as aldosterone control many electrolyte levels and allow the kidneys to retain sodium.

Lixivaptan acts by blocking vasopressin, an anti-diuretic hormone that causes the kidneys to retain water.

Those hormones can make arteries constrict and also stimulate the release of another hormone, aldosterone, which makes the kidney retain salt and excrete potassium.

The small size of the ascorbic acid molecule means the kidneys cannot retain it in the body.

Reduced cardiac output from ineffective pumping stimulates the kidneys to retain fluid.