Final answer:
Reabsorption is the process by which water, salts, glucose, and amino acids are moved from the renal tubules back into the bloodstream, chiefly occurring in the proximal convoluted tubule and loop of Henle.
Step-by-step explanation:
The process of reabsorption is the movement of a substance out of the renal tubules and into the blood. During this process, substances such as water, salts, and organic solutes like glucose and amino acids are transferred from the filtrate back into the bloodstream via the peritubular capillaries.
This typically takes place in the proximal convoluted tubule and the loop of Henle. In the context of kidney function, filtration refers to the movement of material, which is driven by blood pressure, from the blood into the renal tubules forming a filtrate containing water, salts, and waste products like urea.
Conversely, reabsorption is a selective process that helps the body reclaim substances it needs from this filtrate.