Which of the following is NOT a surface barrier serving as the first line of defense? a. mucus b. antibody c. keratin d. oil

Q: A person shows unwelcome immunogenic reactions while exposed to certain substances.(a) Name this…

A: An immune response is a reaction that occurs within the body for the purpose of defending against…

Q: Which of the following is part of the second line of defense against pathogens? a. skin b. mucus…

A: The immune system is made up of special organs, cells and chemicals that fight infection (microbes).…

Q: Which of the following is not a consequence of activation of the complement system? Select one: a.…

A: The immune system of the body can help in preventing various diseases as well as in repairing any…

Q: The elimination of self-reactive thymocytes is called________.a. positive selection.b. negative…

A: The T-cells of the adaptive immune system plays a crucial role in protecting the body from foreign…

Q: The first cell type active in the innate response is usually a(n)       A) phagocyte.…

A: The innate immune system is the first line of defence in the body.

Q: Cell-mediated immune response includes the following except to ______. A. activate B lymphocyte B.…

A: Cell mediated immune response is carried out by T lymohocytes of our immune system. It is an immune…

Q: How many types of antibodies are there? (a) Five. (b) Three. (c) Two. (d) Four.

A: Antigens can be proteins, such as cancer cell receptors, sugars on bacterial and viral cell…

Q: This chemical is released by virus-infected cells to decrease the spread of virus to nearby cells.…

A: Virus-infected cells release certain chemicals that work as immunity protection against viruses. It…

Q: What organ is responsible for producing most of the plasma proteins known as the complement system?…

A: The complement system consists of different plasma protein that enhances the ability of antibodies…

Q: Antibody production takes place ina. T cells.b. natural killer cells.c. B cells.d. mast cells.

A: Immunology is the branch of science which deals with the study of the immune system, immune response…

Q: Which of the following is both a phagocyte and an antigen-presenting cell? a. NK cell b. eosinophil…

A: An Antigen Presenting Cell, like a macrophage, engulfs and digests a foreign bacteria. An antigen by…

Q: Phagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process…

A: Answer is a.)  diapedesis.

Q: Which of the following is a function of cytokines? A. Promote antibody invaders. B. Help T cells…

A: Cytokines : These are small proteins which are crucial in controlling the growth and activity of…

Q: When we get sick we trust our immune system to protect us, but what happens when that system goes…

A: The fundamental elements of the immune system are white blood cells, antibodies, the complement…

Q: Immunosuppression is a lowering of the responsiveness ofthe immune system to materials it recognizes…

A: The immune system safeguards the body against harmful pathogens. The immune cells (B-cells, T-cells,…

Q: Which of the following links the Innate immune system to the adaptive? a. Cytokines b. APC cells c.…

A: INTRODUCTION Antigen presenting cells This is atype of phagocyte. These cells shows antigens on…

Q: Choose the combination of answers that most accurately completes the statement. Which of the…

A: In the complement system, complement is the protein molecules. The complement system is part of the…

Q: __________________ is a condition that results when cytotoxic T cells attack the body’s own cells.a.…

A: Cytotoxic T cells are T cell also known cytotoxic T lymphocytes that kills  virus-infected cells,…

Q: Which of these events is not a part of the second line of defense? You may have more than one…

A: Our body has mainly three line of defence. Defensing foreign substances is important to ensure good…

Q: What is the first step in the antigen-antibody interaction? A.) opsonization B.) epitope production…

A: Out of all the options provided -  Option (A) is INCORRECT - Opsonization is the process of coating…

Q: Antibodiesa. prevent antigens from binding together.b. promote phagocytosis.c. inhibit…

A: Answer: Introduction: Antibody is also known as immunoglobulin, a protein formed by the immune…

Q: ____________ are suspensions of killed or live germs which is employed to induce the production of…

A: Among the given options, option (a) is the most appropriate.It explains that the vaccines are…

Q: B lymphocytes holding knowledge of an infectious agent for future responses are called: a) helper…

A: Immune system acts as a defense system in our body by protecting from effects of pathogens and also…

Q: Which of these cell types aids the activation of T lymphocytes by antigens? a. Macrophages b.…

A: The immune system of a body is broadly classified into innate and acquired type. Innate immunity is…

Q: If you could design a drug that increases extravasation at the endothelium, what is the most likely…

A: The leakage of blood, lymph, or other fluid, such as an anticancer drug, from a blood vessel or tube…

Q: The role of antibodies in the human body is to A stimulate pathogen reproduction to produce…

A: An antibody is a protein component of the immune system that are produced when the body encounters…

Q: Which of the following is a function of the Lymphatic System?

A: Lymphatic system contains organs and tissues spread all over the body help in removal of toxic waste…

Q: are cytolytic proteins that binds to target cell's plasma membrane to form pores. a. Chemokines b.…

A: The immune system is a network of cells and  proteins which form a various level of barrier to…

Q: What is the major role of dendritic cells in the host immune response?

A: Whenever an antigen in enter our body then it leads to the elicitation of the immune system of the…

Q: Which of the following is a type of cytokine? a. mast cell b. lysozyme C c. chemokine O d.…

A: Cytokines are the chemicals produced by the immune cells to protect the non- infected cells.

Q: The cytolytic action of the complement system is most similar to the action ofa. interleukin-1.b.…

A: Complement system- It is a cascade system, plays a role in immune system by enhancing the antibodies…

Q: Which part of an antibody binds to the antigen? a. Heavy chain. b. Light chain. c. Variable region.…

A: Which part of the antibody binds to antigen ? Answer : c. Variable region The variable region is…

Q: A person with AIDS is likely to develop infectious diseases because the virus that causes AIDS…

A: HIV (Human immunodeficient virus) is an RNA virus belonging to the retrovirus group. The virus…

Q: Which line of defense includes active immunity? O first se O third O fourth

A: Active immunity is defined as the immunity gained towards a pathogen after the exposure to that…

Q: Which part of the immune system does not target specific new variants of the COVID 19 invaders? A)…

A: It can be defined as a complex biological system endowed with the capacity to recognize and tolerate…

Q: Select the correct one. Which of the following is part of the second line of defense against…

A: The immune system is made up of special organs, cells, and chemicals that battle contamination…

Q: The complement system of defense is composed of proteins that are always present in the blood. Which…

A: The complement system of defense is composed of proteins that are always present in the blood. The…

Q: Type of specific resistance that has been introduced to the body is already antibodies that provide…

A: A. Natural immunity:- It is a kind of immune response/immunity that the body develops on its own…

Q: The benefit of specific immunity is the production of ________ that provide long-lasting protection.…

A: Solution mentioned below

Q: Naturally acquired active immunity would be most likely acquired through which of the following…

A: Acquired immunity is an immunity that is acquired during the life on exposure to environment. There…

Q: Which of the following statements is not true?(A) An antibody has more than one antigen-binding…

A: The ability of the body to defend itself against invading foreign agents like bacteria, viruses, or…

Q: Which of the following is not a characteristic of inflammation? a. inactivation of macrophages…

A: Inflammation is a type of immune response against infection, injury, and toxins. During inflammation…

Q: If the patient's mother had previously vaccinated her son against chickenpox, what form of immunity…

A: Immunity is the ability of the body to fight against different microorganism. They are of 2 types -…