Micro Exam 5 Portage Learning Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

Micro Exam 5 Portage Learning Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the primary role of antibodies in viral infections? Neutralize the virus and prevent entry into host cells What type of immunity results from vaccination? Active artificial immunity What part of the immune system is responsible for producing memory cells? Adaptive immune system What cells are responsible for killing virus-infected host cells? Cytotoxic T cells What type of vaccine uses inactivated toxins? Toxoid vaccine 2 What class of antibody is first to respond during an initial infection? IgM What class of antibody provides long-term protection? IgG What cell type presents antigens to helper T cells? Dendritic cells What component of the immune system activates the complement cascade? Antigen-antibody complex What test is commonly used to detect antibodies in the blood? ELISA What type of hypersensitivity is an allergic reaction? Type I hypersensitivity 3 What is an example of a delayed hypersensitivity reaction? Tuberculin skin test What is a major cause of graft rejection? Mismatched MHC molecules What virus is commonly associated with latent infections? Herpes simplex virus What is the term for the time between infection and symptom onset? Incubation period What term describes the presence of bacteria in the blood without symptoms? Bacteremia What term describes the spread of infection through the bloodstream causing severe symptoms? Septicemia 4 What type of toxin is secreted by living bacterial cells? Exotoxin What type of toxin is released after bacterial cell lysis? Endotoxin What is the function of a bacterial capsule in infection? Prevents phagocytosis What type of relationship exists when normal flora benefit the host? Mutualism What is the main purpose of Koch’s postulates? To identify the causative agent of a disease