Question

practice it
lo 6.3. what is the reabsorption process?
the transfer of substances from the blood into the filtrate
the process by which the kidneys produce urine
the movement of useful substances from the filtrate back into the blood
the movement of useless substances from the filtrate back into the blood
the process by which substances are removed from the blood and eliminated from the body

Explanation:

Reabsorption is a key process in the nephron (the functional unit of the kidney). After filtration (where blood is filtered to form filtrate in the glomerulus), in the renal tubules, useful substances like glucose, amino - acids, water, and electrolytes (e.g., sodium, potassium) are reabsorbed. This means they move from the filtrate (which is in the renal tubule) back into the peritubular capillaries (blood vessels around the tubules).

• The transfer of substances from the blood into the filtrate is filtration (not reabsorption).
• The process by which the kidneys produce urine involves filtration, reabsorption, and secretion. Reabsorption is just one part of it.
• Useless substances are not reabsorbed back into the blood (they are excreted in urine).
• The process by which substances are removed from the blood and eliminated from the body is more about the overall excretion process (filtration and secretion also play roles here, not just reabsorption).

Answer:

The movement of useful substances from the filtrate back into the blood