Question

Number of leukocytes present in one \[m{m^3}\] of blood is?
A. 5000-8000
B. 2000-3000
C. 8000-13000
D. 1 million to 1.5 million

Answer 1

Hint: Normal ranges for the different parts of blood are:
-Red blood cells: 3.93 to 5.69 million per cubic millimeter (million/ \[m{m^3}\])
- White blood cells: 4.5 to 11.1 thousand per cubic milliliter (thousand/\[m{m^3}\])
- Platelets: 150 to 450 thousand/\[m{m^3}\]

Complete answer:
Option A- 5000-8000
Leucocytes, also known as white blood cells (WBCs) are colorless, nucleated, and motile cells of the blood. Their normal count is 5000-8000 cells per \[m{m^3}\] of blood. They can be granulocytes or agranulocytes depending upon whether they have granules or not.
Granulocytes are acidophils, basophils, and neutrophils.
Agranulocytes are lymphocytes and monocytes.

Option B- 2000-3000
This is considered a low white blood cell count. A low WBC count is known as leukopenia. White blood cells help your body fight infection. If you have lower than normal white blood cells, you have a higher risk of getting an infection as your immune system isn't working as well as it should.

Option C- 8000-13000
Higher levels of WBC are considered leukocytosis. A high white blood cell count indicates that there is an infection against which the immune system is working to destroy. It could also happen in physical or emotional stress. People with particular blood cancers also show high white blood cell counts.

Option D- 1 million to 1.5 million
This is a very high white blood cell count. It doesn't indicate a specific disease in itself, but it can indicate an underlying problem, such as infection, stress, inflammation, trauma, allergy, or certain diseases. That's why this much high white blood cell count will require further investigation.

So, the correct answer is option A- '5000 - 8000'.

Note:
White blood cells are also known as leukocytes. They are immune cells that circulate in the blood and in the lymphatic system. They boost the body's ability to fight infection and other diseases. Types of leukocytes are neutrophils, eosinophils, and basophils, monocytes, and lymphocytes (T cells and B cells).