A normal 3-month-old boy has a hemoglobin of 11.2 g/dL. Which of the following is true about his hemoglobin? It is:
a. Higher than that of a normal full-term newborn
b. Lower than that of an adult of the same age
c. Higher than that of a 14 year old of the same sex
d. The same as that of an adult of the same sex
ANS: B
Hemoglobin is lower in a 3 month old than that of an adult of the same sex. It is normally higher at birth but quickly begins to decrease so that by 3 months old this would be a normal hemoglobin (abnormal at birth). It is lower than that of both a 14 year old and an adult of the same sex.
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