QuestionSBA
QuestionChoice
Around 65% of potassium is re-absorbed in the proximal tubule, and 20-150% is secreted by the distal tubule and principal cells in the collecting duct.
10024375
a
Highest re-absorption in the proximal tubule, highest secretion in the distal tubule and principal cells in the collecting duct
QuestionChoice
Re-absorption of potassium in the proximal tubule is around 65%. However, the thick ascending limb of the loop of Henle is responsible for the absorption of potassium, not secretion.
10024379
e
Highest re-absorption in the proximal tubule, highest secretion in the thick ascending limb of the loop of Henle
QuestionChoice
The thick ascending limb of the loop of Henle only re-absorbs 25% of potassium. Intercalated cells in the collecting duct secrete 0-5% of potassium.
10024376
b
Highest re-absorption in the thick ascending limb of the loop of Henle, highest secretion in the intercalated cells of the collecting duct
QuestionChoice
The thick ascending limb only absorbs 25% of potassium in comparison to 65% by the proximal tubule. The highest secretion of potassium is in the distal tubule and principal cells (20-150%).
10024378
d
Highest re-absorption in the thick ascending limb of the loop of Henle, highest secretion in the distal tubule and principal cells of the collecting duct
QuestionChoice
The re-absorption of potassium in the proximal tubule is around 65% but intercalated cells in the collecting duct only secrete 0-5% of potassium in comparison to the distal tubule and principal cells which secrete >20%.
10024377
c
Highest re-absorption in the proximal tubule, highest secretion in the intercalated cells of the collecting duct
Concept
Chapter
2693
5773
Potassium excretion
Topic
168
Renal Physiology
17273
In which parts of the nephron are potassium re-absorption and secretion the highest?
a