Aldosterone stimulates the cells of the kidney to increase their reabsorption of sodium and water to maintain blood volume and pressure. Hormones. The kidneys maintain a small but important endocrine function by producing the hormones calcitriol and erythropoietin. 1  Calcitriol is the active form of vitamin D in the body. 2  Erythropoietin (EPO) is a hormone produced by cells of the peritubular capillaries in response to hypoxia (a low level of oxygen in the blood).
The Roosevelt Corollary was an addition to the Monroe Doctrine which stated that no European countries were allowed to intervene with Latin American affairs. The only way that â¦ the U.S was allowed to become involved was if the affairs or European countries was threatened.
Monroe Doctrine. Monroe Doctrine, principle of American foreign policy enunciated in President James Monroe's message to Congress, Dec. 2, 1823. It initially called for an end to European intervention in the Americas, but it was later extended to justify U.S. imperialism in the Western Hemisphere. Origins and Pronouncement.