Nur 631 Final Study Guide Graded A+

Which statements best define acute rejection? (Select all that apply.) Acute rejection is a cell-mediated immune response. Acute rejection is usually a type III rejection. Immunosuppressive drugs delay or lessen the intensity of an acute rejection. Acute rejection is associated with the body's response to an organ transplant. Acute rejection is a response against unmatched human leukocyte antigens (HLAs). {Ans: ANS: A, C, D, E Acute rejection is primarily a cell-mediated immune response that occurs within days to months after transplantation. This type of rejection occurs when the recipient develops an immune response against unmatched HLAs after transplantation. A biopsy of the rejected organ usually shows an infiltration of lymphocytes and macrophages characteristic of a type IV reaction. Immunosuppressive drugs may delay or lessen the intensity of an acute rejection.}During an IgE-mediated hypersensitivity reaction, what causes bronchospasm? a. Bronchial edema caused by the chemotactic factor of anaphylaxis b. Bronchial edema caused by binding of the cytotropic antibody c. Smooth muscle contraction caused by histamine bound to H1 receptors d. Smooth muscle contraction caused by histamine bound to H2 receptors {Ans: ANS: C During an IgE-mediated hypersensitivity reaction, smooth muscle contraction caused by histamine bound to H1 receptors results