What is the normal WBC count?

What is the normal WBC count?

• A. 0.5-1.5 x10^9/L.
• B. 2.0-4.0 x10^9/L.
• C. 4.0-11.0 x10^9/L.
• D. 20-30 x10^9/L.

Answer: (C)

Normal WBC counts reflect the number of immune cells in circulation and help indicate how the body responds to infections or inflammation. For healthy adults, the standard reference range is about 4.0 to 11.0 x 10^9/L, which is roughly 4,000 to 11,000 cells per microliter. This range accounts for individual and lab differences. Values below this range (leukopenia) can occur with bone marrow suppression or certain diseases, while values above (leukocytosis) often indicate infection, inflammation, stress, or hematologic disorders. Among the options, the range 4.0 to 11.0 x10^9/L is within the normal range.

Normal WBC counts reflect the number of immune cells in circulation and help indicate how the body responds to infections or inflammation. For healthy adults, the standard reference range is about 4.0 to 11.0 x 10^9/L, which is roughly 4,000 to 11,000 cells per microliter. This range accounts for individual and lab differences. Values below this range (leukopenia) can occur with bone marrow suppression or certain diseases, while values above (leukocytosis) often indicate infection, inflammation, stress, or hematologic disorders. Among the options, the range 4.0 to 11.0 x10^9/L is within the normal range.