Question

The cells which directly attack and destroy the antigens are known as
A) Helper T-cells
B) Killer T-cells
C) Helper B-cells
D) Killer B-cells

Answer 1

they are known as killer t cells

Answer 2

Answer:

The correct answer is option 'B'

Explanation:

Killer T cell directly attacks and destroys the antigens.

• Killer T cells are part of our immune system and can directly kill certain pathogen cells of viruses, bacteria or any other antigen.
• They are formed in our bone marrow and their maturation takes place in the thymus.
• When an antigen attack our body macrophages release messenger molecules called cytokines.
• Cytokines stimulate T helper cells to release lymphokines which are also messenger molecules.
• Lymphokine stimulates B cells to produce antibodies against the specific antigen and it also stimulates killer T cells to directly attack and kill the antigen.