Mechanism Of Concentration Of Filtrate

Question 1

which parts of nephron play a significant role in concentration of urine

Answer 1

loop of henle
vasa recta

Question 2

what is a counter current flow in loop of henle and vasa recta

Answer 2

in two limbs, flow is in opposite directions

Question 3

osmolarity in cortex

Answer 3

300 mOsmol/L

Question 4

osmolarity in medulla

Answer 4

1200 mOsmol/L

Question 5

gradient of osmolarity is caused by which compounds

Answer 5

NaCl
urea

Question 6

NaCl is transported by _______ limb of henle’s loop which is exchanged with __________ limb of vasa recta

Answer 6

ascending
descending

Question 7

NaCl is returned to the interstitium by the __________ portion of vasa recta

Answer 7

ascending

Question 8

small amounts of urea enter the ________________ of henle’s loop which is transported back to the interstitium by the _______________

Answer 8

thin ascending
collecting duct

Question 9

counter current mechanism helps to maintain a concentration gradient in

Answer 9

medullary interstitium

Question 10

presence of the interstitial gradient helps in an easy passage of __________ from the collecting tubule thereby concentrating the urine

Answer 10

water

Question 11

human kidneys can produce urine nearly _________ times more concentrated than inital filtrate formed

Answer 11

four