what are the hormones produced by the kidney
Kidney The kidneys secrete a variety of hormones, including erythropoietin, and the enzyme renin. Erythropoietin is released in response to hypoxia (low levels of oxygen at tissue level) in the renal circulation. It stimulates erythropoiesis (production of red blood cells) in the bone marrow. Calcitriol, the activated form of vitamin D, promotes intestinal absorption of calcium and the renal reabsorption of phosphate. Part of the renin–angiotensin–aldosterone system, renin is an enzyme involved in the regulation of aldosterone levels.
Aldosterone Aldosterone, the main mineralocorticoid hormone, is a steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland.[1][2] It is essential for sodium conservation in the kidney, salivary glands, sweat glands and colon.[3] It plays a central role in the homeostatic regulation of blood pressure, plasma sodium (Na+), and potassium (K+) levels. It does so mainly by acting on the mineralocorticoid receptors in the distal tubules and collecting ducts of the nephron.[3] It influences the reabsorption of sodium and excretion of potassium (from and into the tubular fluids, respectively) of the kidney, thereby indirectly influencing water retention or loss, blood pressure and blood volume.[4] When dysregulated, aldosterone is pathogenic and contributes to the development and progression of cardiovascular and renal disease.[5] Aldosterone has exactly the opposite function of the atrial natriuretic hormone secreted by the heart.[4]