Quiz 14: The Lymphoid System and Immunity

Biology

Pathogen is any type of various microorganisms that cause diseases in humans, including viruses, bacteria, fungi, and parasites. Individual pathogens have a distinct mode of life and way of interacting with the body.

Humoral immunity is also known as antibody-mediated immunity, as it involves the secretion of antibodies in order to fight antigens and pathogens. The B cells fight against antigens and invasive particles in the body through production of antibodies that recognize that particular antigen and defend the body against it. Hence, this item matches with option (h). 2. Lymphoma is nothing but cancer that occurs to lymphatic system. Hence, this item matches with option (k). 3. A complement system is a complex of circulating proteins that interact with each other to opsonize pathogens. Hence, this item matches with option (b). 4. Neutrophils and eosinophils are white blood cells, which are otherwise called microphages. Hence, this item matches with option (g). 5. Moncytes are the white blood cells, which have the ability to phagocytose pathogens. Monocytes are also called macrophages. Hence, this item matches with option (d). 6. Microglia are a type of macrophages that reside in brain. Hence, this item matches with option (c). 7. Interferons are protein molecules secreted by host body in response to invading pathogens such as viruses, bacteria, tumors, and parasites etc. Hence, this item matches with option (j). 8. Pyrogens are any agents that can induce fever. Hence, this item matches with option (a). 9. The name itself conveying that innate immunity is the defense system that is present at birth. Hence, this item matches with option (i). 10. Active immunity is a form of immunity, which get activated when the body exposed to antigens from the environment. Hence, this item matches with option (l). 11. Passive immunity is achieved when antibodies produced by another person is introduced into the host. Hence, this item matches with option (f). 12. Apoptosis is a programmed cell death mechanism. There are number of proteins and signaling mechanisms involve in apoptosis. Hence, this item matches with option (e).

Nonspecific defense is a type of immunity in the body that has anatomical barriers and defense mechanisms aimed towards preventing infectious organisms from invading or attacking them. This defense is considered innate because the mechanisms do not distinguish potential threats from one another. The specific defense is developed in response to a particular type of pathogen. In this type of immunity, the body develops an adaptive defense against such a pathogen so it is immune to future invasions.

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