Maximum reabsorption of filtered glucose is from
**Core Concept**
Glucose reabsorption in the kidneys is a critical process for maintaining blood glucose homeostasis. The renal tubules, particularly the proximal convoluted tubule (PCT), are responsible for the majority of glucose reabsorption.
**Why the Correct Answer is Right**
Glucose reabsorption occurs through a sodium-glucose cotransporter (SGLT2) in the PCT. This cotransporter uses the concentration gradient of sodium ions to drive the reabsorption of glucose molecules into the renal tubular cells. As the glucose is reabsorbed, it is then released into the bloodstream, maintaining normal blood glucose levels. The SGLT2 is responsible for the maximum reabsorption of filtered glucose.
**Why Each Wrong Option is Incorrect**
**Option A:** This is not a valid option.
**Option B:** This option is not relevant to the process of glucose reabsorption in the kidneys.
**Option C:** This option is incorrect as the loop of Henle is primarily involved in water and ion reabsorption, not glucose.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the kidneys filter approximately 180 liters of blood per day, but only 1-2% of this filtered load is excreted as urine. The majority of glucose reabsorption occurs in the PCT, which highlights the importance of this region in maintaining glucose homeostasis.
**Correct Answer:** C. The loop of Henle is primarily involved in water and ion reabsorption, not glucose.