Question

The cell responsible for non-specific immunity in the body is
(a) B cell
(b) Fibrinogen
(c) Pathogen
(d) Phagocyte
(e) T cell

Answer 1

Hint: These are a type of white blood corpuscles that utilizes the process of phagocytosis to engulf and digest the foreign cell or the invader.

Complete answer:
The innate, or nonspecific, immunity is the defense system that comes into action immediately or within hours of the appearance of an antigen or foreign cell in the body. This type of immunity remains present in our body by the time of birth and is made up of phagocytes. So, it is also called inborn immunity. When a phagocytic cell engulfs bacteria or a foreign cell, a phagosome is formed around it and the entire complex is ultimately transferred to the lysosome for degradation. This immunity involves macrophages, neutrophils, and dendritic cells

Additional Information: -This mechanism involves physical barriers such as our skin, chemicals present in the blood, and phagocytic cells such as macrophages, neutrophils, and dendritic cells, that attack foreign cells in the body.
-The inborn immunity is characterized by relatively nonspecific mechanisms that mean cells are not fighting against only specific infection or injury, so the rapid inflammation is experienced shortly after any kind of injury or infection.
-This mechanism attacks or repels all the foreign cells equally. The phagocytosis antibody response is an example of non-specific immunity in the body.
-Pathogens are foreign cells or microorganisms that are responsible for causing infections or diseases.
-B cells are mainly involved in the production of only antigen-specific antibodies that means it fights against specific antigen or invader.
-T cells are a type of lymphocytes that develops in the thymus gland and are derived from the bone marrow.
-Fibrinogen is responsible for the clotting of blood.
So, the correct answer is, ‘Phagocyte’.

Note: -The cells of the nonspecific immune system function in the first line of defense against infection or injury.
-The cells of the nonspecific immune system are always present at the site of infection or injury and always ready to fight against foreign cells.
-Antigens are the surface molecules of the pathogen that are recognized by the immune system to initiate an immune response.