Question

For each of the following, indicate where they are reabsorbed or secreted. If nothing happens, leave it blank.

a) Reabsorbed
b) Secreted
c) No action

Answer 1

Tubular reabsorption occurs in the PCT part of the renal tubule, where most nutrients and water are reabsorbed. In the Loop of Henle, water reabsorption decreases, and in the collecting ducts, it can increase or decrease as needed.

Step-by-step explanation:

Tubular reabsorption occurs in the PCT part of the renal tubule. Most of the Ca++, Na+, glucose, and amino acids are reabsorbed here to maintain homeostatic plasma concentrations. Water is also reabsorbed in the PCT, primarily due to the low blood pressure and high osmotic pressure in the peritubular capillaries. In the Loop of Henle, water reabsorption decreases, indicated by decreased loss of water in the ascending loop of Henle. In the collecting ducts, water absorption can increase or decrease as needed.