MCQ Detailed View

Blood sugar refers to the amount of glucose present in the bloodstream. Glucose is the primary source of energy for body cells, especially for the brain, muscles, and organs. Maintaining blood sugar within a normal range is critical for proper physiological function.

🔹 Standard Measurement Units

The most common unit for blood glucose measurement is mg/dL (milligrams per deciliter). This unit indicates how many milligrams of glucose are present in one deciliter (100 milliliters) of blood. For example:

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  Normal fasting blood glucose: 70–100 mg/dL

  
  


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  Post-meal (2 hours) blood glucose: less than 140 mg/dL

  
  

Other units exist, such as mmol/L, used in some countries, but mg/dL remains widely adopted, particularly in Pakistan, the US, and several other regions.

🔹 Importance of Blood Sugar Monitoring

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  Diabetes Management: Regular measurement helps prevent complications such as kidney damage, vision problems, and cardiovascular diseases.

  
  


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  Detecting Hypoglycemia or Hyperglycemia: Low or high blood sugar levels can be life-threatening if not controlled.

  
  


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  Health Screening: Routine check-ups may include fasting blood glucose tests to assess metabolic health.

  
  

🔹 Why Not Other Options?

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  mmHg: Unit for blood pressure, not glucose

  
  


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  PPM (Parts Per Million): Used for very dilute solutions, not standard for blood sugar

  
  


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  Gram/Liter: Could be used theoretically but not standard in clinical practice

  
  

✅ Key Facts Recap

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  Blood sugar = concentration of glucose in blood

  
  


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  Standard unit = mg/dL (milligrams per deciliter)

  
  


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  Normal fasting range: 70–100 mg/dL

  
  


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  Critical for diabetes monitoring and overall health

  
  

👉 Correct Answer: Option 2 – mg/deciliter