The juxtaglomerular cells are specialized cells that stimulate the secretion of the adrenal hormonealdosterone and play a major role in renal autoregulation, the kidney's self-governance. Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all living organisms, sometimes called the building blocks of life. ... A hormone (from Greek horman - to set in motion) is a chemical messenger from one cell (or group of cells) to another. ... Aldosterone is a steroid synthesized in the mid-section of the adrenal cortex of the adrenal gland. ... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...
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