Selective Reabsorption in the Nephron Quiz

Selective Reabsorption in the Nephron

• Selective reabsorption begins in the proximal convoluted tubule, where essential nutrients are reclaimed from the filtrate.
• Approximately 100% of glucose and amino acids are reabsorbed through active transport in this segment.

Mineral Ion Reabsorption

• Mineral ions, primarily sodium (Na+), are actively reabsorbed in multiple parts of the nephron, including the loop of Henle, distal convoluted tubule, and collecting duct.
• Active transport mechanisms drive the reabsorption of various ions, ensuring electrolyte balance.

Substances Not Fully Reabsorbed

• Urea is an example of a substance that is not reabsorbed by 100% in the nephron, allowing for its excretion as waste.

Salts Reabsorption

• Most sodium ions (Na+) reabsorption occurs in the proximal convoluted tubule, where a significant amount of salts are returned to the bloodstream, aiding in fluid and electrolyte balance.