N221- Drexel- Hickey- 4. Altered Immunity Review Questions with Correct Answers

Inflammation nonspecific response Dentritic cells Start of the specific immune system. These cells 'present' the antigens of invading microorganisms on their membranes and allow the correct T cells to bind. Dendritic cells are critical to processing and displaying antigens to T lymphocytes. Mature dendritic cells take up antigens when they are encountered in the circulation. Langerhans cells, immature dendritic cells in the skin, carry surface receptors for immunoglobulin and complement, important in the immune response. Difference between inflammation and immunity Difference from inflammation is that immunity HAS MEMORY. Antigen a foreign invader of the body, such as a bacterium or virus, or other stuff Whats good with Immune Defense Third line of defense recognition and neutralization of foreign substances specific immune response immunologic memory Whats up with B cells? B cells= create antiBodies to fight antigens Immunity Specificity and memory Memory memory- remember the antigen & act faster the next time the antigen is introduced specifitcity •Specificity - recognizes one specific antigen humoral vs. cell-mediated immunity Humoral -B-cells -makes antibodies -recognize pathogens while circulating -free-floating Cell-mediated -Helper T-cells and Cytotoxic T-cells -helps control intracellular pathogens