Jimmy went to a hospital to take some laboratory tests. After he had gotten the result, he found out that the count of his red blood cells was 2.7 x 10^6/uL. The doctor said that the normal adult male hemoglobin count is 13.5 g /100 mL. A low hemoglobin count would result in anemia, and a high hemoglobin count would result in polycythemia. If you were the doctor, identify the condition of Jimmy. Hemoglobin is (C2952H4664O832S8Fe4). One red blood cell has approximately 270 million hemoglobin molecules.
Correct answer: A. Anemic
- A. Anemic
- B. Cannot be determined
- C. Normal
- D. Polycythemic
Explanation
To determine whether Jimmy is anemic or not, we need to calculate his hemoglobin count based on the given red blood cell count.One red blood cell contains approximately 270 million hemoglobin molecules. So, the total number of hemoglobin molecules in Jimmy's blood can be calculated as follows:2.7 x 1012 cells/uL x 270 x 106 molecules/cell = 729 x 1018 molecules/uLTo convert this to the standard units of hemoglobin count (g/dL), we need to divide by a conversion factor of 6.242 x 1014 molecules/g:729 x 1018 molecules/uL ÷ 6.242 x 1014 molecules/g = 11.7 g/dLThis is lower than the normal adult male hemoglobin count of 13.5 g/dL, indicating that Jimmy is anemic.
This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.
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