Under what condition would glucose levels decrease in a sample?

Under what condition would glucose levels decrease in a sample?

• A. If the sample is chilled
• B. If the sample sits at room temperature
• C. If the sample is exposed to light
• D. If the sample is centrifuged

Answer: (B)

Glucose levels in a sample decrease primarily due to cellular metabolism. When a blood sample is left at room temperature, the red blood cells and other cells in the plasma continue to consume glucose. This ongoing glycolytic activity leads to a reduction in the glucose concentration in the sample over time.

While chilling the sample can help preserve glucose levels by slowing down metabolic processes, leaving the sample at room temperature does the opposite by allowing continued glucose consumption. Centrifugation separates components of the blood but does not influence the glucose level significantly if done promptly. Exposure to light does not have a direct effect on glucose stability compared to the metabolic activity of the cells in the sample. Thus, the condition that leads to decreased glucose levels is indeed when the sample sits at room temperature.