Question

Which of the following provides non-specific immunity?
a) B-cell
b) Fibrinogen
c) Pathogen
d) Phagocyte
e) T-cell

Answer 1

Hint: Phagocytes are specialized immune cells that fight and engulf intruders or foreign particles once they enter inside the body.

Complete answer:Immune system or immunity is the system of our body which helps us in combating infection caused by various microorganisms present in the environment.
A. B-cells are responsible for the production of antigen-specific antibodies.
They (antibodies) recognize the epitope present on the surface of bacteria and viruses.
B. Fibrinogen is a protein that is involved in the process of blood clotting. Its primary function is to occlude blood vessels to stop bleeding. During any tissue or vascular injury, it converted enzymatically or with the help of thrombin into fibrin and then to a fibrin-based blood clot.
C. Pathogens are biological agents that cause disease or illness to its host. The surface molecules of the pathogen that are recognized by the immune system to initiate immune response are termed epitopes.
D. Phagocytes are the component of non-specific immune response and kill by engulfing the pathogens that invade the body. They are cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.
E. T-cells functions in cell-mediated immunity. T-cell acts against tumor or transplant cells.
So, the correct option will be option D) because phagocytes are the only ones responsible to kill the foreign particles when they entered our bodies.
Thus, the correct answer is an option (D) Phagocyte.

Additional information:
Non-specific immunity, also known as innate immunity is a system that consists of general mechanisms through which the body keeps us safe, no matter to which pathogens (disease-causing germs) we are exposed to.

Note:Phagocyte kills or digests those microbes that enter into our body by any means. Non-specific immune cells function in the first line of defense against infection or injury.