Question

Which one of the following is a matching pair of a certain body feature and its value/ amount in a normal human adult?

• A. Urea- 5-10 mg/l00mL of blood
• B. Blood sugar (fasting)- 70-100 mg/100ml
• C. Total blood volume- 5-6
• D. ESR in Wintrobe method- 9-15 mm in males and 20-34 mm in females

Answer 1

Answer: (B)

Blood sugar (fasting)- 70-100 mg/100ml

The liver produces urea in the urea cycle as a waste product of the digestion of protein. Normal adult blood should contain 6-20 mg of urea nitrogen per 100 ml of blood i.e., 6-20mg/dl per 100 ml of blood. So, option A is correct.
A normal fasting (no food for eight hours) blood sugar level is between 70 - 100 mg/dl. So, option B is correct.
Blood volume is the volume of blood, both RBCs and plasma in the circulatory system of any individual. A typical adult has a blood volume of approximately 4.7-5 liters. So, option C is incorrect.
ESR is erythrocyte sedimentation rate is the rate at which RBC sediment in a period of one hour. That value in men is from 12-19 mm/hour while in females is 18-23 mm/hr. So, option D is also incorrect.
Thus, the correct answer is option (B), 'Blood sugar (fasting) -70-100 mg/100ml'.