Question

Which one of the following leucocytes transforms into macrophages?

• A. Eosinophil
• B. Basophil
• C. Monocyte
• D. Lymphocyte

Answer 1

The correct option is C

Monocyte

The correct option is C:

Explanation of the correct option :

Option C:

1. Monocytes are leucocytes that are motile and phagocytic in nature that engulf bacteria and cellular debris.
2. During any injury to the tissue, monocytes are actively recruited to the damaged sites.
3. It matures in different types of macrophages or dendritic cells by rapidly differentiating.
4. These macrophages then help in fighting the microbes or invaders.

Explanation of the incorrect option :

Option A:

1. Eosinophils are a type of white blood cell.
2. They are granulocytes that fight infections by releasing granule proteins or degranulating.

Option B:

1. Basophils are granulocytes, which means they have huge cytoplasmic granules in their nucleus.
2. It stores histamine, a vasodilator, as well as the anticoagulant heparin and serotonin, which causes inflammation.

Option D:

1. Lymphocytes are B-cells or T-cells and they have receptors on their surface.
2. Its function is to protect the body against viral infections and produce proteins to help us fight infection (antibodies).

Final answer: Monocyte leucocytes transform into macrophages.