How and where are most of the urea and ammonia molecules removed from blood?
1) secreted by the distal convoluted tubules
2) secreted by the collecting ducts
3) filtered at the glomerulus
4) secreted by the proximal convoluted tubule cells
5) secreted by the loop of Henle
Ο 1,3
Ο 2,3
Ο 3,4
Ο 4,5
Ο 5