N5315 Test 2 Questions with 100% Correct Answers

What do CD4/helper T cells do? Correct Answer Activate macrophages, B-cells, cytotoxic T-cells, and other CD4 cells What is released by Th1 and what does it do? Correct Answer Releases IL2 and activates cytotoxic Tcells What does CD4 bind to? Correct Answer MCHII What is released by Th2 and what does it do? Correct Answer Releases IL4 and binds to B cells and activates them What does CD8 bind to? Correct Answer MHC1 Humoral immunity involves what cells? Correct Answer B cells Cell Mediated Immunity involves what cells? Correct Answer T cells Active acquired immunity Correct Answer results from actual exposure to a pathogen Passive acquired immunity Correct Answer Does not involve the host's immune response. Transferred to recipient - immediate, short lived immune response - only last a few months Antigen Correct Answer a toxin or other foreign substance that induces an immune response in the body. Can react with antibodies or antigen receptors on B and T cells What do plasma cells do? Correct Answer produce antibodies IgG Correct Answer -Most common antibody -Binds with viruses, bacteria, toxins, and macrophages -Primary antibody in SECONDARY immune response -Only antibody that crosses placenta IgE Correct Answer -Binds to mast cells, eosinophils, and basophils -parasitic infections and hypersensitive reactions -allergies/allergens IgM Correct Answer -Main immune globulin produced in early PRIMARY immune response. -High levels indicate recent infection