BIO 242 EXAM 3 QUESTIONS WITH 100% CORRECT ANSWERS | 2026

BIO 242 EXAM 3 QUESTIONS WITH 100% CORRECT ANSWERS Which lines of defense would be considered nonspecific and innate? First line of defense Second line of defense Differentiate between components of first and second line defense FIRST:Physical and Chemical barriers SECOND: phagocytosis, inflammation, fever, antimicrobial proteins FLOD: lysozome is secreted in tears and saliva What human body region is protected by fatty acids, acidic pH, lactic acid, and tough cell barrier with its own normal biota? skin The sweat doud on skin and saliva in the mouth attributed to what line of defense? First line Eosinophils attack parasitic helminths Basophils - make up less than .5% of circulating WBCs - granules contain histamine When monocytes migrate from the blood out to the tissues, they are transformed by inflammatory mediators to develop into________ Macrophages Inflammation- Cardinal Signs - Rubor: redness - Calor: warmth -Tumor: swelling Dolor: pain The third line of defense against foreign invaders can be described as having _______ and _______ Specificity and Memory A foreign molecule that causes a specific immune response is an ______ Antigen ___ cells are part of the humoral immunity and mature in the Bone Marrow B cells ____ cells are part of the cell mediated immunity and mature in the thymyus T cells The most abundant class of antibodies in serum is -ANSWERS- IgG _____ cells secrete antibodies Plasma IgG monomer= 80% highest number of antibodies 2 binding site IgA dimer= 13% of antigen 4,2 biding site IgM