AIIMS 2003 Zoology Blood Composition MCQ Question

To determine the correct matching pair of a body feature and its value/count in a normal human adult, let's analyze each option provided in the question.

Correct Answer: B) Blood sugar (fasting) - 80-100 mg/100 ml

Explanation for Option B: In a normal human adult, the fasting blood glucose (sugar) levels typically range from 80 to 100 mg/dL (milligrams per deciliter), which can also be expressed as 80-100 mg/100 ml. This is a well-established value and is critical for assessing metabolic health. Blood sugar levels below 70 mg/dL may indicate hypoglycemia, while levels above 126 mg/dL on two separate tests can indicate diabetes.

Analysis of Other Options:

Option A: Urea - 5-10 mg/100 ml of blood

• Explanation: The normal concentration of urea in blood (blood urea nitrogen, BUN) is typically around 7-20 mg/dL, which translates to 7-20 mg/100 ml. Since the value given (5-10 mg/100 ml) is below the normal range, this option is incorrect.

Option C: Total blood volume - 3 - 4 litres

• Explanation: The average total blood volume in an adult human is approximately 5 to 6 liters, not 3 to 4 liters. While individual variations exist based on body size and composition, 3-4 liters is generally considered below normal for adults. Therefore, this option is also incorrect.

Option D: ESR in Wintrobe method - 9-15 mm in males and 20-34 mm in females

• Explanation: The Erythrocyte Sedimentation Rate (ESR) values can vary based on several factors including age and gender. The typical ESR values in adults are approximately 0-15 mm/hour for males and 0-20 mm/hour for females in the Wintrobe method. While the ranges provided in the option are somewhat close, they are not standard for all age groups and conditions; thus, this option is misleading and not universally accurate.

Summary

Among the options provided, only Option B correctly matches a body feature (blood sugar levels) with its standard value in a normal human adult.

Key Concepts:

• Fasting Blood Sugar: Essential for diagnosing diabetes and monitoring glucose metabolism.
• Blood Urea Nitrogen (BUN): Indicates kidney function and protein metabolism.
• Total Blood Volume: Reflects overall body fluid status and is critical in hemodynamics.
• ESR: Used as a non-specific marker for inflammation and disease but varies widely.

In conclusion, the correct answer is B, as it accurately represents a normal physiological measurement in adults, whereas the other options fail to align with established medical standards.