Which of the following plays a role in the Arthus reaction?a. IgE antibodies. b. complement c. cell-associated antigen d. cytotoxic T cells

Q: Which of the following is NOT a function of the immune system?

A: A complex network of cells, organs and proteins that can defend the body against infection and which…

Q: Identify which of the following immune responses is pivotal to the killing and elimination of…

A: The helminths are a type of parasite that has a worm-like structure. They survive by feeding on the…

Q: Jay, a young dad, takes his baby to the pediatrician several times in the first year of the child’s…

A: To explain: Why the visits of the baby to the pediatrician to stimulate to make memory cells against…

Q: How does HIV (human immunodeficiency virus) lead to AIDS (acquired immune deficiency syndrome)/lead…

A: Human immunodeficiency viruses causes AIDS.This is the condition where gradual failure of immune…

Q: Which of the following pairs is mismatched? a. activation of memory cells: secondary immune…

A: Explanation given for the mismatch pair.

Q: A macrophage phagocytizes an invading E. coli bacterium.  Select the type of MHC molecule that…

A: A macrophage is one of the cells of immune system which plays an important role in innate as well as…

Q: All of the following are necessary for a specific immune response except: O a. red blood cells O b.…

A: Immune response is the manner in which the body protects itself against substances it considers…

Q: Which of the following interactions will NOT provoke an immune response?     A. Endogenous antigen +…

A: Ans - d) Endogenous antigen + MHC Class I + BCR, will not provoke an immune response. The two types…

Q: Decreased immunity is a symptom of HIV/AIDS. This is caused by which of the following? Select one:…

A: Acquired immunodeficiency syndrome (AIDS) is a spectrum of life-threatening conditions is caused by…

Q: Farmer's lung is a hypersensitivity pneumonitis resulting from a. a type I hypersensitivity reaction…

A: The body's defence mechanism against allergens, autoimmunity, and venom is hypersensitivity. Pollen,…

Q: Once Tfh cells have been activated against vaccine delivered intramuscularly which Constant (C)…

A: There are five classes of immunoglobulin or antibodies. All these antibodies have variable and…

Q: Which cytokine does not activate NK cells early in a viral infection? a. IFN-a b. IFN-b c. IFN-g d.…

A: Interferon alpha or a is produced due to leukocytes infected with virus. Interferon beta or b…

Q: The major inflammatory mediator released by degranulating mast cells in type I hypersensitivity is…

A: The body's defence mechanism against allergens, autoimmunity, and venom is hypersensitivity. Pollen,…

Q: What does the T-cell receptor on the helper T cell bind? free antigen in soluble form b. antigens…

A:

Q: The capsule of the infecting microorganism which is composed of polysaccharides can also activate…

A: Introduction  The immune response is a set of mechanisms that the body uses to protect itself from…

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: A number of minor cancerous cells and infected viruses, such as Epstein Barr (EBV), are able to go…

A: Cytotoxic T cells or cytotoxic T lymphocytes are the type of T lymphocytes that plays a role in…

Q: Which structure is not functioning properly if an electrical device is needed to stimulate the atria…

A: The heart has an electrical conduction system that consists of a highly constricted and controlled…

Q: Explain why each choice (a-d) is correct or incorrect.  A vaccine is effective because  a. The…

A: Vaccine contain weak or inactive parts of particular antigen that triggers an immune response…

Q: .

A: There are two types of the T cells based on the glycoprotein attached , these are CD4 cells and the…

Q: Which is/are not part of adaptive immunity?a. phagocytic cells e. antigen receptorsb.…

A: Adaptive immunity is a type of immunity that an organism gets after it has been exposed to an…

Q: An example of innate immune cells are: A. Macrophages B. Dendritic cells C. T cells D. B cells…

A:

Q: Cytotoxic T cells express which of the following proteins on their cell surface? (Select all that…

A: T cells or T-lymphocytes are the immune cells. These cells are the type of white blood cells that…

Q: Which of the following is NOT true of B ceIls? a. Has membrane-bound antibodies. b. Produces…

A: Answer : d . Kills infected body cells B cells are responsible for secreting Antibodies. T cells are…

Q: A. vagina B. trachea and bronchi C. skin D. stomach E. mouth select A B C D E 1. villi pushing…

A: 1) vagina - low pH , antibodies and secretions  2) trachea and bronchi - villi pushing material…

Q: The region of an antibody that is the antigen binding site is thea. constant region. b. variable…

A: Proteins that are Y-shaped that fight against the body’s foreign invaders are called Antibodies.…

Q: Explain why each choice (a-d) is correct or incorrect. B lymphocytes are categorized as part of the…

A: The immune system in our body is responsible for protecting us against foreign pathogens. The white…

Q: Which of the following best represents a second line of defense: a. Both A and C b. Fever c.…

A: Defense is the first line of attack against germs and antigens. There are three lines of defense:…

Q: Which of the following binds to the Fc portion of the antibody?     A. C1q   B. C2a   C. C1r…

A: Complement systems is a complex set of soluble molecule that generate a variety of reactions that…

Q: The T-cell antigen receptor is similar to immunoglobulin molecules in that it: a. can cross the…

A: Antigens are any foreign bodies that enter the human body. The body has an immune system that…

Q: Which of the following conditions is example of type 3 hypersensitivity reaction? a. Lupus b.…

A: Type 3 hypersensitivity Reaction: Type 3 hypersensitivity is also known as immune complex-mediated…

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: Sponges display nonspecific immunity. In an experiment, the cells of two different sponges were…

A: Immunology is the branch of science that deals with the study of the immune system, its mechanisms,…

Q: After a second exposure to a vaccine,   Select one: A.  Antibodies are made slowly and in greater…

A: vaccines are killed or attenuated antigens or antigenic molecules . they are used to prevent…

Q: Which of the following does not occur during a secondary immuneresponse?a. Antibodies are made…

A: Secondary Immune Response: Secondary Immune Response is one of the important features in which the…

Q: When virus enters into our body, many cells acquire antiviral state due to: a Acquiring resistance…

A: When virus enters our body many cells acquire antiviral state due to INTERFERON PRODUCTION (e)

Q: nstant antigen ndependent antigen ependent antigen

A: Antigen is a molecule which arouses an immune response usually in the form of antibodies in the…

Q: What types of cells could be involved in specific immune reactionsagainst the rabies virus?a. T…

A: Viruses are microscopic parasites, typically much smaller than bacteria. They lack the ability to…

Q: Which of these is a valid example of an antigen and its corresponding epitope? Select one: a. An…

A: Antigen  is any substance that causes body's immune system to produce antibodies against it .

Q: Protein receptors found on macrophages that recognize foreign antigens a. toll-like receptors…

A: Macrophages are a type of white blood cell that takes part in protecting the body against foreign…

Q: To become a fully activated, antibody-secreting cell, B cells usually need: a. to encounter an…

A:

Q: Viral antigens appear on the surface of the infected cell in association with which of the following…

A: Answer is d.)MHC-II complex.

Q: Which of the following is NOT a mechanism used by the immune system to fight multicellular…

A: Immunology is a section of biology that studies molecules, cells, and organs that build up the…

Q: 4 ree floating MHCII

A: As we know The proteins that bind to the body's foreign invaders are known as antibodies in the…

Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.