clearance

Question 1

if a substance is freely filtered and completely secreted into the nephron, what is the clearance equal to

Answer 1

renal plasma flow

i.e. all PAH enters the tubule and none is left in the renal vein

Question 2

how can you calculate renal blood flow from renal plasma flow

Answer 2

53% is plasma

RPF x 100/53

Question 3

how do you calculate clearance

Answer 3

urine concentration x urine flow rate / plasma concentration

Question 4

the clearance of glucose is 0. what does this mean

Answer 4

it is completely reabsorbed

Question 5

the clearance of inulin is 125 what does this mean

Answer 5

it is neither reabsorbed or secreted

Question 6

the clearance of PAH is 625 what does this mean

Answer 6

it is completely secreted and no reabsorption