Kidneys Flashcards
Plasma K+ concentration
4mEq/L
Urine [K+]
20-70 mEq/L
Plasma [Urea]
10 mEq/L
Urine [Urea]
300 mEq/L
Plasma [Creatinine]
0.001 mEq/L
Urine [Creatinine]
10 mEq/L
Is glucose expelled in urine?
No
Parts of the nephron, in order 1 2 3 4 5 6 7
1) Bowman’s capsule
2) Proximal tubule
3) Descending limb
4) Loop of Henle
5) Ascending limb
6) Distal tubule
7) Collecting duct
What occurs between the glomerulus and Bowman’s capsule?
Filtration
Which blood vessels run beside the tubules?
Peritubular capillaries
Where does reabsorption occur?
Between tubule and peitubular capillaries
Proximal tubule
Descending, ascending limbs
Distal tubule
Collecting duct
Where does secretion occur?
From peritubular capillaries to tubule
Proximal tubule
Distal tubule
Collecting duct
What determines the amount of solute excreted?
Amount filtered - amount reabsorbed + amount secreted
What structure gives rise to peritubular capillaries?
Efferent arteriole
What do the peritubular capillaries become?
Renal vein
What is secreted?
K+
What is filtered? 1 2 3 4 5 6 7 8
1) Na
2) Water
3) K
4) Ca
5) PO4
6) Glucose
7) Creatinine
8) Urea
Where does water reabsorption occur?
Descending limb
Collecting duct
Where does Na reabsorption occur?
Ascending limb
What is reabsorbed? 1 2 3 4 5 6 7
1) Water
2) Na
3) K
4) ca
5) PO4
6) Glucose
7) Urea
Water excretion
1%
Na excretion
0.5%
K excretion
10%
Ca excretion
2%
