Tubular Reabsorption And Secretio

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Created Nov 8, 2010
by
ericaforone

 

 
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1
Why is movement to the peritubular capillaries easy to do?
 
they have high colloid osmotic pressure very low blood pressure due to narrow efferent arteriole...
2
Physical qualities of the PCT
 
great length prominent microvilli abundant mitochondria for active transport
3
Two routes of the PCT
 
transcellular-through epithelial cells of PCT paracellular-between epithelial cells of PCT
4
When transport proteins of cell membrane are saturated.
 
transport maximum
5
What does the PCT reabsorb?
 
Sodium, Glucose, Amino Acids, Water, Nitrogenous wastes
6
Primary function of loop of henle
 
enable collecting duct to concentrate the urine and conserve water
7
What does the loop of Henle reabsorb?
 
remaining water, 2/3 remaining Na, K, and Cl
8
The Loop of Henle recaptures ________ and returns it to the ______________.
 
NaCl, renal medulla
9
What does the descending limb of the Loop of Henle do?
 
-reabsorbs water, not salt -concentrates tubular fluid
10
What does the ascending limb of the loop of Henle do?
 
-reabsorbs Na, K, and Cl -maintains high osmolarity of renal medulla -impermeable to water -tubular...
11
What is the role of the vasa recta?
 
countercurrent exchange system
12
What happens in the descending capillaries of the vasa recta?
 
water diffuses OUT of blood NaCl diffuses INTO blood
13
What happens in the ascending capillaries of the vasa recta?
 
-water diffuses INTO blood -NaCl diffuses OUT of blood


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