Which process is responsible for returning useful solutes such as electrolytes and glucose to the blood during kidney function?

• A. Exocytosis
• B. Tubular secretion
• C. Tubular reabsorption
• D. Glomerular filtration

Answer: (C)

Verified step by step guidance

1. Understand the function of the kidney: The kidney is responsible for filtering blood, removing waste products, and maintaining homeostasis by regulating water, electrolytes, and solutes.
2. Learn the key processes in kidney function: These include glomerular filtration, tubular reabsorption, and tubular secretion. Each process plays a distinct role in filtering and processing blood.
3. Focus on tubular reabsorption: This process occurs in the renal tubules, where useful solutes such as glucose, electrolytes, and water are actively or passively transported back into the bloodstream.
4. Compare tubular reabsorption to other processes: Glomerular filtration involves the initial filtering of blood in the glomerulus, while tubular secretion involves the active transport of waste products into the tubules for excretion. Exocytosis is unrelated to kidney filtration and reabsorption.
5. Conclude that tubular reabsorption is the process responsible for returning useful solutes to the blood, ensuring the body retains essential nutrients and maintains balance.