Hypersensitivity Overview and Types

Which of the following is NOT a characteristic of Type II hypersensitivities?

What is the primary role of surface antigens on red blood cells in relation to blood transfusions?

Which of the following mechanisms is NOT involved in the destruction of cells in Type II hypersensitivities?

What happens when an individual receives a transfusion of blood with incompatible antigens?

What is the key difference between Type I and Type II hypersensitivities?

Why is it crucial to determine a patient's blood type before a blood transfusion?

What is the mechanism that leads to hemolytic disease of the newborn?

Which of the following statements regarding transfusion reactions is NOT true?

What is the primary reason why an Rh+ child's first pregnancy with an Rh- mother is typically uneventful?

What is the main consequence of repeated Rh+ blood cell exposure to an Rh- mother's immune system?

What is the medical term for the condition affecting a baby due to Rh incompatibility?

What is the primary role of the enlarged liver and spleen in a baby affected by Rh incompatibility?

What is the significance of the first Rh immune globulin shot administered to the Rh- mother during her pregnancy?

In the context of Rh incompatibility, what is meant by 'sensitization'?

During which trimester of a pregnancy is the first Rh immune globulin shot typically given?

What is the main reason why doctors administer a series of two Rh immune globulin shots during a pregnancy?

What is the primary trigger for Immediate (Type I) Hypersensitivity reactions?

Which type of hypersensitivity is associated with an immune response to antigens on cells?

Which of the following best defines hypersensitivity?

What distinguishes Cytotoxic (Type II) Hypersensitivity from other types?

What is the main mechanism behind Type I Hypersensitivity reactions?

Which type of hypersensitivity is linked to immune complexes that elicit an inflammatory response?

What does immunotherapy by desensitization aim to achieve?

Which statement is true regarding Cell-mediated (Type IV) Hypersensitivity?

What is the primary role of helper T cells in a normal allergic reaction?

What type of antibodies are produced by plasma cells during a normal allergic reaction?

Which of the following statements about desensitization is accurate?

What occurs during a second exposure to an allergen in a normal allergic reaction?

In type II hypersensitivities, what type of antibodies are mainly produced?

What is the effect of denatured allergens in the immune response?

Which immune cell type binds to IgG in type II hypersensitivity?

What characterizes the symptoms alleviated by allergy treatments?

What occurs in an Rh-negative mother carrying an Rh-positive fetus for the first time?

What leads to hemolytic disease of the newborn with a subsequent Rh-positive pregnancy?

Which of the following describes the Rh factor in blood typing?

What is erythroblastosis fetalis most commonly caused by?

In what way do anti-Rh antibodies affect the fetus?

How is sensitization defined in the context of Rh incompatibility?

What is the role of specific antibodies in cytotoxic (Type II) hypersensitivity?

What damage occurs due to the inflammatory response in cytotoxic hypersensitivity?

What is the primary role of B cells in the allergic response?

What do IgE antibodies bind to during an allergy response?

What is a potential outcome of generalized anaphylaxis?

Which cytokine is primarily involved in driving the proliferation and differentiation of B cells into plasma cells?

What happens during the degranulation of mast cells and basophils?

Which of the following substances can trigger an allergic response mediated by IgE?

What physiological effect do histamines have on blood vessels?

What characterizes the sensitization process in allergies?

During an allergic reaction, what do armed TH cells release to promote B cell activity?

What is cross-linking of IgE antibodies indicative of in an allergic response?