1. Describe the two lines of defense of the immune system. a. What is innate ver

Question

1. Describe the two lines of defense of the immune system.

a. What is innate versus acquired immunity?

b. What are the four basic steps of immune response?

c. Describe the main primary and secondary lymphoid tissues and their major functions.

d. Describe what happens when a phagocyte encounters a microorganism. Your answer should include the following terms: phagocytosis, pathogen, chemotaxin, cytokine, lysosome, antigen-presenting-cell, MHC-II complex, antigen, helper T cell, inflammatory response

Explanation / Answer

Innate immunity is first line of defense that involve epithelium barrier muscus barrier and macrophas that secretare cytokinesis to defend against pathogen.acquired involved direct interection between antigen and antibody where antigen presenting cell present foreign praduceto the antigen presenting cells.

B) basic step inmuim response--patogen phagocytosis complex MHC-ll antigen presenting cells antigen helper .cells .chemotaxin

C) primary lymph organ-it is source b and t cell formation from stem cells.in secondary organ -it is source of B and T axmctivation.lymph node

D ) when a microorganisms encountr phahocytes than it release cytokines and activate inflammatory response

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