Question

What 2 things are usually reabsorbed into the peritubular capillaries?

a. Water (H2O) and Sodium Chloride (NaCl)
b. Glucose and Amino Acids
c. Urea and Creatinine
d. Hydrogen ions (H+) and Bicarbonate ions (HCO3-)

Answer 1

Water (H2O) and sodium chloride (NaCl) are the substances usually reabsorbed into the peritubular capillaries from the filtrate during the process of tubular reabsorption in the kidneys.

Step-by-step explanation:

The two things that are usually reabsorbed into the peritubular capillaries are water (H2O) and sodium chloride (NaCl). The process of tubular reabsorption occurs mainly in the proximal convoluted tubule (PCT) of the nephron, where essential nutrients and electrolytes are recovered from the filtrate and returned to the blood. Sodium is actively transported out of the PCT, which creates the osmotic pressure necessary for water to follow and be reabsorbed into the peritubular capillaries. This process is influenced by hormones and includes the presence of aquaporins, or water channels, for the reabsorption of water independently of sodium.