NEET2026BiologyChapterActual
A laboratory analysis of a healthy individual's blood sample reveals a total leukocyte count of 6000 mm ⁻³ . Based on the standard proportions of formed elements, what is the approximate expected number of neutrophils and monocytes, respectively, in this sample?
Options
- A3600 - 3900 mm ⁻³ and 1200 - 1500 mm ⁻³
- B3600 - 3900 mm ⁻³ and 360 - 480 mm ⁻³
- C1200 - 1500 mm ⁻³ and 360 - 480 mm ⁻³
- D3600 - 3900 mm ⁻³ and 120 - 180 mm ⁻³
Correct answer
B. 3600 - 3900 mm ⁻³ and 360 - 480 mm ⁻³
Step-by-step solution
Total leukocyte (WBC) count is given as 6000 mm ⁻³ . According to the standard differential leukocyte count, neutrophils constitute 60 % - 65 % of total WBCs, and monocytes constitute 6 % - 8 % of total WBCs. Number of neutrophils = 60 % to 65 % of 6000 = 60 100 6000 to 65 100 6000 = 3600 to 3900 mm ⁻³ Number of monocytes = 6 % to 8 % of 6000 = 6 100 6000 to 8 100 6000 = 360 to 480 mm ⁻³ Thus, the expected number of neutrophils and monocytes are 3600 - 3900 mm ⁻³ and 360 - 480 mm ⁻³ , respectively. Answer: 3600 - 3