Chapter Questions
What does the first and second lines of defense have in common (not shared by the third line of defense)?
Match the word with the appropriate definition:
Choose the correct term from each pair: The cell-mediated response targets intracellular/extracellular pathogens such as viruses/pollen and relies on B cells/T cells.
Choose the correct term from each pair: How does the immune system "remember" an infection and protect you against a second invasion? How is it related to vaccine function?
Choose the correct term from each pair: What is the first line of defense when an antigen is attempting to invade your body?
Choose the correct term from each pair: The humoral response targets intracellular/extracellular pathogens and relies on B cells/T cells to produce antigens/antibodies to bind to and help remove the invader.
How does passive immunity differ from active immunity? When is this sort of immunity important?
Every year, you need to be revaccinated against the seasonal flu virus. Why is this necessary, unlike other vaccines that offer protection for years?