MODULE 5 EXAM QUESTIONS AND ANSWERS 2022

The portion of the antigenic molecule that is recognized by the lymphocyte is called the antigenic determinant or: A) MHC complex. B) immunoglobulin. C) epitope. D) haplotype. - ANS-C) epitope. The Fc portion of the antibody: A) is responsible for binding to specific antigen. B) is responsible for creating the hinge region of the antibody. C) consists of light chains. D) interacts with inflammatory cells. - ANS-D) interacts with inflammatory cells. Molecules that are capable of inducing an immune response are called: A) lymphocytes. B) haptens. C) antigens. D) antibodies. - ANS-C) antigens. Which cell stimulates both the cell-mediated and humoral immune responses? A) Plasma cells B) Cytotoxic T cells C) B lymphocytes D) Helper T cells - ANS-D) Helper T cells At birth, IgG levels in newborn infants are: A) low. B) high. C) near adult levels. D) absent. - ANS-C) near adult levels. At birth, IgG levels in newborn infants are near adult levels, but start to decrease as maternal antibodies are broken down. When a person has an allergic reaction to bee stings, which antibody causes the lifethreatening hypersensitivity response? A) IgM B) IgA C) IgE D) IgG - ANS-C) IgE Immune cells distinguish "self" from "nonself" by recognizing: A) cellular RNA. B) major histocompatibility antigens. C) different types of phospholipids in a cell's membrane. D) "nonself" enzymes secreted by foreign cells. - ANS-B) major histocompatibility antigens.