Regulation Of Urine Concentration And Volume

18 cards

A&P II


 
  
Created Jul 1, 2012
by
kmeer26

 

 
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1
conuntercurrent mechanism ensures 
 
interstitial fluid in renal medulla becomes hypotonic 
2
countercurrent mechanism is so named because
 
descending and ascending limbs of nephron loops run parallel to each other
3
tissues are impermeable to water unless _____is present. This allows the body to ___-water...
 
ADHconserveavoid
4
upper portion of ascending limb is relatively impermeable to _____but does not actively reabsorb...
 
watersodium chloridepotassium
5
end result of ascending loop is that the  interstitial fluid outside the ascending limb...
 
 hypertonic hypotonic 
6
ADH changes the permeability of ____tubule by causing insertion of _____in the tubule  so...
 
distal aquaporin distal
7
when there is excess water, _____secretion decreases and more _____results and the excess is...
 
ADHdiluted urine
8
The ___cells of distal convoluted tubule are impermeable to ____in the absence of ____
 
epithelial waterADH 
9
if ADH is present, there is ______reabsorption, and the urine is more ______
 
increased water concentrated
10
Urea is a by-product of_____in _____
 
amino acid catabolismliver 
11
urea plasma concentration is a function of the amount of ____ingested
 
protein 
12
uric acid is a by-product of _____
 
nucleic acid metabolism
13
composition of urine varies depending on
 
dietary intake physical activity
14
urine is _____% water
 
95
15
urine contains 
 
ureauric acidcreatinineamino acidselectrolytes 
16
output of urine varies b/w ____and _____a day
 
0.6 and 2.5 liters
17
urine output should be at least ______per hour
 
30 ml (cc)
18
if urine output falls below 30 cc (ml) per hour for more than ____hrs than this likely indicates...
 
4urinary 


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