A client is scheduled for a hemoglobin A1c laboratory test. The nurse explains to the client that this test monitors:
1. the percentage of glucagon in the blood.
2. the level of hemoglobin over time.
3. the percentage of glucose present in the blood.
4. the level of glucose over time.
Correct Answer: 4
Rationale 1: This test does not measure the percentage of glucagon in the blood.
Rationale 2: This test does not measure the percentage of hemoglobin over time.
Rationale 3: This test does not measure the percentage of glucose in the blood.
Rationale 4: Hemoglobin A1c measures the level of blood glucose over time because glucose molecules attach to the hemoglobin molecule for the life of the RBC, which is 120 days.
Global Rationale: Hemoglobin A1c measures the level of blood glucose over time because glucose molecules attach to the hemoglobin molecule for the life of the RBC, which is 120 days. This is not a test of the percentages of glucagon, hemoglobin, or glucose in the blood.
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