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| Description: Neural Regulation Kidneys are richly supplied by sympathetic fibers. Strong stimulation (exercise or hemorrhage)–afferent arterioles are constricted. Urine output is reduced, and more blood is available for other organs. Hormonal Regulation Angiotensin II constricts afferents and efferents, diminishing GFR. Atrial Natriuretic Peptide relaxes mesangial cells, increasing capillary surface area and GFR. ANP is secreted in response to stretch of the cardiac atria. Tubular Reabsorption and Secretion Much of the filtrate is reabsorbed Especially water, glucose, amino acids, and ions Secretion helps to mange pH and rid the body of toxic and foreign substances. Picture Stats: Views: 152 Filesize: 45.77kB Height: 361 Width: 638 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40856 |