The complement system of defense is composed of proteins that are always present in the blood. Which statement describes the importance of this system in early pathogen defense? Group of answer choices It does not have to be activated by antibodies. It causes immediate pathogen lysis. It rapidly lower the blood pH. It recognizes specific common pathogens.

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

Place the event from first to last

How do antibodies inactivate antigens? activation of complement agglutination all answers are correct neutralization

The dead outer surface of skin (not mucous membranes) uses which of the following innate defenses to inhibit microbial growth?  Choose all that apply. Group of answer choices Prion production Interferon production Low pH Dryness

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)?