When ADH is present, what is the effect of increasing the medullary concentration gradient on the urine volume? - Urine volume increases and becomes more concentrated. What is part of the filtrate in the nephron; however, would be absent or in low quantities in the urine? - Glucose - Nitrogenous waste - Red blood cells Which hormone would help increase Na+ and water reabsorption and also increases K+ secretion? - Aldosterone
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ADH increases the medullary concentration gradient, which results in an increase in urine volume. Show more…
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Antidiuretic hormone (ADH) is involved in maintaining homeostasis by regulating water retention in the kidneys. Some of the events related to the secretion of ADH are listed below. Place these events in the correct order: Osmoreceptor cells in the brain detect high solute concentration ADH flows from the brain the the kidneys The distal tubule and collecting duct of the nephron become more permeable More water is reabsorbed into the blood
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ADH causes increased reabsorption of water from the filtrate as the filtrate passes through the collecting duct toward the renal pelvis. The mechanism associated with ADH's action is: A. Insertion of water channels in the apical membrane of the cells of the collecting duct, increasing its permeability to water. B. Insertion of larger water channels (channels with greater diameters) into the apical membrane of the collecting duct, increasing the flow rates through the epithelium. C. Increasing the number of Na+,K+-ATPases in the basolateral membrane of the epithelium while simultaneously increasing the number of sodium channels in the apical membrane, thereby increasing Na+ reabsorption with water following as a consequence. D. All of the above. E. None of the above.
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