Question

Glycosuria occurs when Plasma glucose level exceeds

• A. . 120-140mg/dl
• B. . 160-180mg/dl
• C. . 130-150mg/dl
• D. . 100-120mg/dl

Hint:

Remember the normal fasting blood glucose levels (\textless 100 mg/dL) and the renal threshold for glucose (around 180 mg/dL). This helps understand conditions like diabetes and kidney function related to glucose.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks about the plasma glucose concentration threshold at which glycosuria (glucose in the urine) typically occurs.

Step 3: Detailed Explanation:
* Glycosuria: This condition refers to the excretion of glucose into the urine. Under normal circumstances, the kidneys reabsorb almost all the filtered glucose back into the bloodstream.
* Renal Threshold for Glucose: The kidneys have a maximum capacity to reabsorb glucose from the glomerular filtrate, known as the renal threshold for glucose. When the plasma glucose level exceeds this threshold, the renal tubules cannot reabsorb all of it, and the excess glucose is excreted in the urine.
* For most healthy individuals, the renal threshold for glucose is typically between 160-180 mg/dL (or approximately 9-10 mmol/L). In patients with diabetes mellitus, this threshold might be altered.
Therefore, glycosuria generally occurs when the plasma glucose level exceeds 160-180 mg/dL.

Step 4: Final Answer:
Glycosuria occurs when Plasma glucose level exceeds 160-180mg/dl.