Question

which of the following tests measures the average blood glucose over the past 100 - 120 days.
a) fasting blood glucose
b) glucose tolerance test
c) glycosylated hemoglobin
d) fructosamine

Explanation:

Glycosylated hemoglobin (HbA1c) attaches to hemoglobin in red - blood cells. Red - blood cells have a lifespan of about 100 - 120 days, so HbA1c reflects average blood glucose over that period. Fasting blood glucose measures glucose at a single point after fasting, glucose tolerance test checks the body's response to a glucose load, and fructosamine measures average glucose over 2 - 3 weeks.

Answer:

c) Glycosylated hemoglobin