Type II hypersensitivity reaction                                                  Type III hypersensitivity reaction A. Effector T cells specific for the sensitizing Ag B. Immune complexes formed from IgG binding to soluble Ag C. Antibodies specific for altered components of human cells 2. Because the FceRI receptors on mast cells, basophils and eosinophils always have IgE bound, they have Ag-

Q: 21. The following is correct about superantigens? A. cause autoimmune disease C. activates B cells…

A: Introduction :- Superantigens (SAgs) are a group of antigens that cause the immune system to become…

Q: 90. Put the events of initial allergen sensitization in order. APC ingests, [Choose ] v digests, and…

A: First : Plasma cells produce IgE against allergen. Second : IgE attach to mast cells. Third: APC…

Q: Which of the following are second line defenses?  Check all that apply.   Inflammationchecked…

A: Immunity is a resistence of our body against the invading pathogenic agent. It is also considered as…

Q: What molecule ensures that T-lymphocytes which encounter their antigen in the lymph node stay there…

A: T cell is a type of lymphocyte.T cells are one of the important white blood cells of the immune…

Q: 29. T-cell dependent antigens can a. directly stimulate B cells to multiply and produce antibodies…

A: The correct answer is (c) restrict antibody formation. T-cell dependent antigens require the help of…

Q: Active immunity generally lasts longer than passive immunity. A. True B. False

A: Active immunity happens when our own immune system is liable for protecting us from a pathogens.…

Q: 107. Put the events of a type I hypersensitivity reaction in order. allergen attaches to IgE…

A: Adaptive Immune reaction is the type of host defense mechanism that protects the host from…

Q: Match the following antimicrobial proteins with the location where they are found or cell where they…

A: Various antimicrobial substances are naturally produced and present within the defense cells of the…

Q: Type II hypersensitivities are due toa. IgE reacting with mast cellsb. activation of cytotoxic T…

A: Normal immune system produces undesirable reactions such as allergies and autoimmunity and this is…

Q: CRITICAL THINKING New research suggests a link between some microbes that normally live in the body…

A: Periodontitis is a disease that affects the gum causing destruction of the teeth. The teeth may…

Q: 1. These cells can release factors that can induce programmed death of a target cell, release…

A: Introduction: Immunity is referred to as the host's resistance against any foreign antigen,…

Q: 91. Put the events of a type I hypersensitivity reaction in order. allergen attaches to IgE…

A: The  events of a type I hypersensitivity reactions in order is; First -> allergen attsches to IgE…

Q: The indirect reason for the appearance of skin lesions due to a Type IV hypersensitivity is Tc cells…

A: Hypersensitivity  Hypersensitivity or hypersensitive reactions are intolerance type reactions which…

Q: 6. Match the example/scenario provided to the type of humoral immunity. a. active, naturally…

A: The ability of the body to fight back any infection in the body comes from its immune system. The…

Q: 1.Label the following figure that shows the sequence of events by which cytotoxic T cells destroy…

A: There are two types of immunity.  Innate immunity - It is present since birth. It is non-specific.…

Q: During the secondary immune response, in the serum you would expect a. to find a greater…

A: Introduction The secondary immune response occurs on repeated antigen exposures, with a stronger…

Q: 3. Helper T cells can be activated by I. interacting with an infected cell expressing an antigen-MHC…

A: Introduction Antigen-presenting white blood cells (WBC), such as macrophages (a large phagocytic…

Q: The following statement regarding Type I hypersensitivity reaction is FALSE: * prostaglandins,…

A: The false statements regarding Type I hypersensitivity reaction is:- The initial response is…

Q: 13. As a response to viral-infected cells, the following cell gets activated? A. TH1 B. TH2 C. TH3…

A: Introduction  A host is required for the growth of viruses, which are microscopic infectious…

Q: allergic asthma is an example of type 1 hypersensitivity, what are the major characteristics of this…

A: Allergic asthma is asthma which trigger by same substance which triggers allergy. Type 1…

Q: Match the hypersensitivity to the example, each type can be used more than once or not at all. ✓ Hay…

A: Hypersensitivity is the reaction of the immune system to certain substances resulting in allergic…

Q: phagocytes?

A: Phagocytes: Phagocytes are a type of immune cells which surround and kill microorganisms. They…

Q: When encountering antigen, describe the mechanism of antigen presentation by B cells.

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Type I                                                             Type III…

A: 1) Sensitisation is an immunological reaction which occurs when any foreign body (bacteria/virus)…

Q: 5. A patient receives a donor kidney to replace diseased kidney tissue. Consider and answer the…

A: Cytotoxic T cells * MHC restricted * Antigen specific *Belong to adaptive immunity  * Requires…

Immune Disorders

The collaboration between the cells and proteins that work together as a defense system against infection comprises the immune system.Each of them performs a variety of tasks to recognize and/or react against a foreign body.