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57 Cards in this Set
- Front
- Back
What is the type of drug that works in the PCT?
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Carbonic anhydrase inhibitors
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The PCT is the major site for _____ reabsorption? What percentage does it reabsorb? (several things)
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amino acids, glucose, cations, sodium cloride and sodium bicarbonate, 60-70%
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Where is CA found in the PCT?
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On the brush border and inside the cell.
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What is the class of drugs that work in the TAL? What specifically does it inhibit?
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Loop diuretics, the Na,K,2Cl cotransporter.
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What 2 molecules are reabsorbed in the TAL?
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Ca and Mg
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What percentage of reabsorption takes place in the TAL?
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20-30%
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What does the K do in the TAL?
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K is pumped into the cell from both directions, thus, it "excapes" through a K-channel into the lumen. This creates a net Positive charge in the lumen.
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What is pumped out of the lumen of the nephron in the DCT?
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Na and Cl
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What class of drug works in the DCT?
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Thiazide diuretics
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What percentage of molecules is reabsorbed in the DCT?
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5-8%
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In what segment of the nephron does PTH work? What does it control?
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DCT, Ca reabsorption
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In which segment of the nephron does aldosterone work? What specically does it control?
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CCT, Na reabsorption, when Na is absorbed, K is excreted.
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What types of drugs work in the CCT?
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K-sparing diuretics
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What do K-sparing diuretics target?
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the aldosterone receptor and the Na channels of the CCT.
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What hormone controls water reabsorption?
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ADH in the CCT.
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Describe the effect of the CA inhibitor.
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It causes increased sodium bicarbonate excretion.
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Name a drug that is a CAi. It is a _____ derivative.
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Acetazolamide. sulfonamide
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Does the effect of CAi only happen in the nephron? Where else might it happen?
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NO, in eye and CSF
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If body bicarbonate is depleted _______ will result.
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metabolic acidosis
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Most drugs act from the _____ side of the membrane, and thus must be _____.
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luminal side, filtered through the glomerulus
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________, an aldosterone receptor antagonist group, enters the collecting tubule from the basolateral side.
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Spironolactone
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Acetazolamide can be use to treat _______, b/c it lowers the IOP.
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glaucoma
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Name a CAi that can be used to treat glaucoma and high-altitude sickness.
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Acetazolamide
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What is really the only reason that you would choose to prescribe aceatzolamide for its diruetic effect?
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if the person had signifcant metabolic alkalosis.
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Can acetazolamide cause kidney stones?
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yes
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Name an example of a loop diuretic. It is a ______ derviative.
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Furosemide, sulfonamide
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Loop diuretics inhibit the function of _____.
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the Na,K,Cl cotransporter
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Are the loop diuretics long or short acting?
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short, only lasts about 4-hours
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A full dose of furosemide causes __________.
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big excretion of Na and Cl. (sodium chloride diuresis)
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Without the Na,K,Cl cotransporter you loose the ____ potiental in the ____.
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loose the positive potential in the lumen.
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______ will result( the final state of body) from the use of fursoemide.
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hypokalemic alkalosis
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The use of a NSAID with a loop diuretic will greatly ______ the efficacy of the diuretic.
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decrease
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The major reason to use a loop diuretic is if the person has _______. What can cause this?
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edema, CHF and ascites
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What is another (smaller) reason to use furosemide. (other than for edema)?
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to treat severe hypercalcemia (from a malignacy) remember, Loop diuretics cause you to excrete Ca
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T or FL the use of furosemide can cause ototoxicity.
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true
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What could you do to detoxify a drug.
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alkalize the urine by using acetazolamide
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_____ is an osmotic diuretic.
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Mannitol
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Mannitol is used to ____ urine volume and ____ IOP.
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decrease, lower. (tons of water is excreted)
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_______ is similar to furosemide--it is a loop diuretic.
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Ethacrynic acid
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What drug would you use if the patient has pulmonary edema and needs a diiuretic?
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Furosemide
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Loop diuretics cause you to ___ the amount of Ca excreted into the lumen.
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increase
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Name 3 contratindications for using a loop diuretic.
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1- if they have gout
2- difficulty breathing 3- high blood pressure |
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Loop diuretics cause ____ uric acid in the blood.
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increased
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ototoxicity is a side-effect of _____.
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loop diuretics
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Thiazide diuretics _____ the amount of Ca excretion.
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decrease
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Name a thiazide diuretic.
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HCTZ (hydrochlorothiazide)
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What is the drug of choice if a patient has high blood pressure?
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HCTZ
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____ is similar to HCTZ--it is a thiazide.
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Indapamide
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Can HCTZ cause hyperlipidemia?
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yes
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What is the name of the channel in the CCT that increases Na reabsorption and K excretion?
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amiloride-sensitive channel
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____ is similar to amiloride.
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Triamterene
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What drug is commonly used with HTCZ?
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amiloride
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Describe the action of amiloride.
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It blocks the channel Preventing Na reaborption and K excretion.
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YOu need to add amiloride in all cases of _____.
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Potassium wasting
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What drug would you use if the patient has hyperaldosteronism.
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spironolactone
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Gynomastica and hirsutism are side effects of what drug? why?
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spironolactone. It looks like testosterone
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In an emergeny situation, what diuretic is bast to use?
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loop diuretics--they are more potent
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