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Cards In This Set
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What is the basic functional unit of the kidney?
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The nephron
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What does the urine formation process involve?
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Filtration of plasma, reabsorption of water and certain solutes, and secretion of wastes
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What is GFR?
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Glomerular Filtration Rate, its the amount of filtrate produced in the kidneys each minute
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What regulates the GFR?
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Cardiac output
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What is the DCT an important site for?
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Active secretion of ions, acids and other materials, selective reabsorption of sodium ions from the tubular fluid
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Changing the diameter of the afferent and efferent arterioles to alter the GFR can be an example of what kind(s) of regulation?
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Hormonal, autonomic, and local (autoregulation)
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What is the primary function of the urinary system?
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Vital excretory functions, eliminates organic waste products from cells, regulates the volume and solute concentration of body fluids
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What structures are components of the urinary system?
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Kidneys, ureters, urinary bladder, urethra
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What is the function of the juxtaglomerular apparatus?
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Secretes the enzyme renin and hormone erythropoietin
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Name the three distinct processes involved in urine production.
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Filtration, reabsorption, and secretion
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Which parts of the urinary system are responsible for the transport, storage, and elimination of urine?
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Ureters, urinary bladder, urethra
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What happens when the renal threshold for a subatance exceeds its tubular maximum?
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The amount of substance that exceeds the tubular maximum will be found in the urine
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What does sympathetic activation of the nerve fibers in the nephron cause?
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Regulates of glomerular blood flow/pressure,stimulates renin release, stimulates water and Na reabsorption
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Sodium reabsorption in the DCT and the cortical portion of the collecting system is accelerated by the secretion of what?
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Aldosterone
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What happens when ADH levels rise?
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The amount of water reabsorbed increases
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