The proximal convoluted tubule is responsible for the most amount reabsorption of almost all filtered substances (sodium, glucose, amino acids, etc) and reabsorbs around 67% of each filtered substance. Reabsorption of sodium and water here is isotonic; remaining sodium in the tubule affects the glomerulotubular balance and would decrease glomerular filtration rate if in excess.
Flashcards on Proximal convoluted tubule
Proximal convoluted tubule
With or without the presence of aldosterone, the area of the nephron that always reabsorbs the (most/least) amount of sodium is the proximal convoluted tubule.