Question

Cells involved in immune mechanism are
A. Erythrocytes
B. Lymphocytes
C. Eosinophils
D. Thrombocytes

Answer 1

Hint: When cells are involved in an immune mechanism, it is called cell mediated immunity. Cell mediated immunity involves the activation of macrophages and NK-cells, the production of antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.

Complete answer:
In this question, we have asked about the cells that are involved in the immune mechanism. The immune system is a host defense system. The parts of the immune system includes: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow.
Here, we have four options, the first option is Erythrocytes. Erythrocytes are a red blood cell and the main function of RBC is to carry oxygen to the body. The next option is lymphocytes. Lymphocytes are white blood cells, made in the bone marrow and found in the blood and lymph tissue. As we already mentioned white blood cells are a part of the immune system. WBC are involved in protecting the body against both infectious disease and foreign invaders.
The 3rd option is eosinophil. Eosinophils are a type of white blood cells and one of the immune system components. Eosinophil are responsible for protecting the body against multicellular parasites and certain infections. The next option is thrombocytes. Thrombocytes are platelets, they are involved in the clotting mechanism of blood.

Among them, lymphocytes are involved in immune mechanisms. So, the correct option is B. Lymphocytes.

Note:
Eosinophils are also a type of white blood cell, but they have little role in the immune mechanism. They are mainly involved in allergic reactions. The main cells involved in the immune mechanism are lymphocytes which are of two types: B lymphocytes and T lymphocytes.