Question

Which one of the following is agranulocyte?
a. Neutrophil
b. Eosinophil
c. Basophil
d. Monocyte

Answer 1

Hint: In the blood, white blood cells are classified into granulocytes and agranulocytes, which means if the granules are present in the cytoplasm of white blood cells, they are called as granulocytes, while if granules are absent in the white blood cells, called as agranulocytes.

Complete answer:
- The white blood cells, which come under agranulocytes are Lymphocytes, monocytes, and macrophages.
- The granules are absent, and these cells consist of the only nucleus, hence they, are called mononuclear leukocytes.
- They constitute 35% of the total white blood cells.
- Lymphocytes are one of the most important cells of the white blood cells, and they are responsible for the stability of the body, and it fights with various infections.
- Monocytes are also present in large numbers and they are amoeboid in shape.
- Monocytes generally constitute 2 to 8% of the total leukocytes.
- The nucleus of the monocytes are horse-shaped cells, and lobes are not present.
- Lymphocytes and monocytes do not usually come from the same lineage.
- This monocyte enters the blood to the circulation, where they are converted to macrophages or dendritic cells, and their function is based on the type of infection.
- Other than agranulocytes, some other white blood cells are present, they are granulocytes, which come under this are Neutrophils, basophils, and eosinophils

Hence, the correct answer is option (D).

Note: Lymphocytes have a major role in immunity, the lymphocytes are of two types, b lymphocytes produce antibodies, and the T lymphocytes attack the infected cells, and they attack the foreign particles and natural killer cells are also play a major role.