Question

With reference to WBC, which of the following statements is/are correct?

1. In leukemia, there is an abnormal increase in WBC count.
2. During parasitic infection WBC count increases in the range of 20,000-30,000

1. 2 and 3 only
2. 1, 2 and 3
3. 3 only
4. 1 and 2 only

Answer 1

Correct Answer - Option 4 : 1 and 2 only

The correct answer is 1 and 2 only.

 

• White blood cells are an important component of our blood system.
• These are only 1% of our body but their effect on our health is significant.
• White blood cells are produced inside the bone marrow and are stored in the blood and lymphatic tissues.
• One cubic mm. Their number is 25 lakhs.
• Leukemia -
  • It is a cancer of the blood or bone marrow.
  • This is an abnormal growth of white blood cells (WBC).
• The normal range of white blood cells in the blood of a healthy adult human is 4,000 to 11,000.

• The percentage and common range of WBCs and their types in healthy adults is as follows -
  1. Neutrophils or polymorphisms - 40 - 60%
  2. Monocytes - 2 - 8%
  3. Lymphocytes (B and T cells) - 20 - 40%
  4. Eosinophils - 1 - 4%
  5. Band or young neutrophils - 0 - 3%
  6. Basophils - 0.5 - 1%​