Write differences Functions of PCT and DCT
**A.**Functions of PCT and DCT:
Functions of PCT:
- Reabsorbs glucose, amino acids, phosphates, potassium, urea and other organic - solutes from the filtrate into the peritubular network.
- The PCT regulates pH of the filtrates by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate.
- It is also responsible for secreting organic acids such as creatinine and other bases into the filtrate.
- Proximal convoluted tubule regulate the pH of the filtrate in the kidneys.
Functions of DCT
- It maintains a proper concentration and pH of the urine.
- Extra salts, ions of K+, Na+, Cr and H+ secretes from peritubular capillaries into DCT.
- It secretes ammonium ions and hydrogen ions.
- It is relatively impermeable to water but in the pressure of Antidiuretic hormone (ADH) its permeability to water increases making urine concentrated.