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Phys3 Clear & Transp

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Question
Answer
Clearance   show
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What does clearance asses   show
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show NET secretion or reabsorption  
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Cx X Px = Ux X V   show
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show Cx = (Ux X V)/Px **Measured in ml/min, measure the VOLUME of plasma cleared per unit TIME  
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If a substance is filtered and COMPLETELY reabsorbed, what is the clearance of that substance?   show
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What does it mean to be freely filtered and what are some examples of freely filtered substances?   show
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What are some examples of solutes that are not freely filtered?   show
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Why is inulin a good indicator of GFR   show
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Can a substance have a clearance that is greater than GFR?   show
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Can the clearance of a substance be used to measure RBF?   show
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substance with a clearance = RBF   show
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If GFR=Clearance   show
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If GFR < Clearance   show
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If GFR > Clearance   show
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show Creatinine clearance. It is endogenous and is exported into the BL continuously by skeletal muscle. **It is freely filtered and not reabsorbed (very little is secreted so it could overestimate GFR).  
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show 1.24 hr patient urine. 2.BL sample during collection time. 3.[creatinine] in both BL & urine. 4.Use clearance formlua.  
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Can C(creatinine) levels give inaccurate GFR?   show
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What happens to teh GFR with aging?   show
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normal plasma value of creatinine?   show
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show INVERSELY related. **If GFR dramatically decreases, plasma [creatinine] Inc (GFR < 40ml/min)  
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show Low GFR leads to low urine flow, which Inc urea retention and INCREASES BUN. **Fast flow rates will lead to decreased BUN  
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using BUN to determine dehydration   show
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show INCREASES b/c of the flow dependence of urea excretion but NOT creatinine.  
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show INCREASES it  
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How does a Ded FF affect π(PTC)   show
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