QuestionSBA
QuestionChoice
This is incorrect. Although some potassium reabsorption occurs here, there is also secretion of potassium.
10027679
d
Collecting Duct
QuestionChoice
This is incorrect. Potassium is freely filtered at the renal glomerulus, not reabsorbed.
10027680
e
The glomerulus
QuestionChoice
This is incorrect. Potassium is passively secreted here via the sodium-potassium pump.
10027677
b
Distal Convoluted Tubule
QuestionChoice
This is incorrect. Although potassium reabsorption does occur in the Loop of Henle, more occurs in the proximal convoluted tubule.
10027678
c
Loop of Henle
QuestionChoice
This is correct. Potassium is filtered in the glomerulus of the kidney. It then passes through to the PCT, where most of it is reabsorbed. There is some reabsorption in the Loop of Henle, as well as the distal convoluted tubule and collecting duct. However, potassium secretion also occurs at these sites.
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a
Proximal convoluted tubule
Concept
Chapter
2693
5773
Potassium excretion
Topic
168
Renal Physiology
17933
A 67 year old patient attends their GP practice for monitoring of their serum potassium level. They have required treatment for hyperkalaemia in the past and are keen to know more about how potassium levels are regulated in the body.

Which of the following parts of the nephron is responsible for the majority of potassium reabsorption?
a