N5315 Test 2 QUESTIONS AND VERIFIED SOLUTIONS 2024

N5315 Test 2 What do CD4/helper T cells do? ANSWER: Activate macrophages, B-cells, cytotoxic T-cells, and other CD4 cells What is released by Th1 and what does it do? ANSWER: Releases IL2 and activates cytotoxic Tcells What does CD4 bind to? ANSWER: MCHII What is released by Th2 and what does it do? ANSWER: Releases IL4 and binds to B cells and activates them What does CD8 bind to? ANSWER: MHC1 Humoral immunity involves what cells? ANSWER: B cells Cell Mediated Immunity involves what cells? ANSWER: T cells Active acquired immunity ANSWER: results from actual exposure to a pathogen Passive acquired immunity ANSWER: Does not involve the host's immune response. Transferred to recipient - immediate, short lived immune response - only last a few months Antigen 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? ANSWER: produce antibodies IgG ANSWER: -Most common antibody -Binds with viruses, bacteria, toxins, and macrophages -Primary antibody in SECONDARY immune response -Only antibody that crosses placenta IgE ANSWER: -Binds to mast cells, eosinophils, and basophils -parasitic infections and hypersensitive reactions -allergies/allergens IgM ANSWER: -Main immune globulin produced in early PRIMARY immune response. -High levels indicate recent infection IgA ANSWER: -Main immune globulin found in secretions and mucous membranes. -Prevents invaders from attaching to mucous membranes