immunology correct answers study of the body's resistance to infectious disease
antigen correct answers A foreign substance that causes the production of a specific antibody.
innate correct answers -resist infection using normally present body fcn
-defenses are the SAME for all antigens
-no...
MLS 421 Exam 1(All accurately solved)
immunology correct answers study of the body's resistance to infectious disease
antigen correct answers A foreign substance that causes the production of a specific antibody.
innate correct answers -resist infection using normally present body fcn
-defenses are the SAME for all antigens
-no prior exposure required
-no memory or specificity
-immediate effect
adaptive correct answers -resist infection using acquired tools
-defenses vary depending on the antigen
-prior exposures change the response
-has memory and specific responses
-often delayed effect
diapedesis correct answers movement of marginated neutrophils through BV walls into the surrounded tissues
chemotaxins are chemical messengers that direct the cell into particular direction correct answers how do the actions of chemotaxins affect diapedesis?
kupffer cells-liver
microglial cells- brain
histiocytes-connective tissues correct answers where are these found?
kupffer cells
microglial cells
histiocytes
lymphocytes correct answers primary cell of the adaptive immune response?
t cells diff in thymus
b cells make antibody correct answers t cells diff where?
b cells make what?
cell mediated immunity correct answers type of immunity produced by T cells that attack
infected or abnormal body cells
-produce cytokines
-require Ag in MHC molecules
kill tumor/viral infected cells
-regulate innate and adaptive immune responses plasma cell correct answers most fully differentiated B lymph, does not require MHC molecules presence
natural killer cells correct answers can kill target cells without prior exposure
-1st line of defense against tumor cells, viral cells, infected w/ intracellular pathogens
bone marrow
thymus correct answers What are the primary lymphoid organs?
spleen-destroys old RBCs, platelets, some pathogens
lymph nodes-serve as central collecting point for lymph fluid from adjacent tissues, secondary follicles contain proliferating B cells
CALT-skin
MALT-mucosal correct answers what are the secondary lymphoid organs?
inflammation correct answers body's overall reaction to injury or invasion/infection
redness
swelling
heat
pain correct answers 4 cardinal signs of inflammation
1. release of chemical mediators
histamine from injured mast cells-causes dilation of BV, increased blood flow to affected
area
2. increased capillary permeability
allows fluids from the plasma to enter the tissues, results in swelling and pain
3. migration of WBCs-diapedesis
neutrophils move out into the tissues
4. migration of macrophages
5. stimulation of acute phase reactants correct answers events after tissue injury or similar event?
External innate immunity correct answers Innate = non-specific External = barriers (physical/anatomical)
ex: skin, mechanical barriers, mucosal cells, chemical barriers, self-cleaning flora
internal innate immunity correct answers is cell mediated-phagocytes, T cells
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