Which one of the following best describes the innate nonspecific immune system? Group of answer choices   1. a targeted response to a specific pathogen or molecule that confers immunological memory.   2. the production of antibody molecules against pathogens   3. a set of barrier defenses that adapts to specific pathogens after repeated exposure   4. a generalized set of defenses against a variety of pathogens that lacks immunological memory.

The innate immunity system clears about what percentage of the invading pathogens? 0.90% 50% 0 10% 0 1%

What is the difference between non-specific and specific defenses? Contrast the two methods of defense, why are they important ?

Johnny has just been infected and needs your help in letting him know how his body is fighting the infection. To do so, describe how the innate and adaptive immune systems work together. You should address the following: 1. define adaptive and innate immunity; 2. Describe the role of natural killer cells (how do they work); 3. what are antigen presenting cells and what is their function, what are MHCs?; 4. describe the role of the complement system; 5. what is the role of interferons?; 6. How do helper T cells, cytotoxic T cells and B lymphocytes work make sure you address adaptive immunity memory?; 7. Define HIV, which cells do they attack and why do some individuals develop persistent lymphadenopathy (swollen or enlarged lymph nodes)?