Canadian Practical Nurse Registration Examination (CPNRE) 2026 – 400 Free Practice Questions to Pass the Exam

The expected normal range for white blood cell count is typically 4,000 to 11,000 cells per microliter (µL) of blood. This range is widely recognized in clinical practice and reflects the average values seen in healthy individuals.

White blood cells, or leukocytes, play a crucial role in the immune system, responding to infections and other diseases. A count within this range indicates that a person's immune system is functioning properly. When interpreting laboratory results, it is essential to understand that variations can occur based on factors such as age, sex, and individual health status, but the 4,000 to 11,000 cells/µL range is considered standard.

Other ranges provided fall outside of what is generally accepted for normal laboratory values. For instance, the upper limit of leukocyte counts proposed in other choices may suggest conditions such as leukocytosis, while excessively low counts could indicate leukopenia, neither of which correspond to normal findings in a healthy population. Understanding this normal range helps in assessing a patient's health and determining any potential underlying conditions.