QUESTIONS WITH 100% VERIFIED
ANSWERS
\.Innate Immunity - ANSWERS✔--*First line of defense*: present and unchanging;
intact skin, mucous membranes and their secretions, normal microbiota; prevents
infection
-*Second line of defenses*: phagocytes (neutrophils, eosinophils, dendritic cells,
& macrophages), inflammation, fever, antimicrobial substances; respond to
infection but not present because of infections; response to and cleans up
infection
\.Adaptive Immunity - ANSWERS✔-Third line of defenses: specialized
lymphocytes: T cells and B cells, antibodies
-Protects you from future infection
\.Antigen - ANSWERS✔--Protein (or other) not from the host that is recognized by
the immune system
-Any molecular structure that is foreign that is recognized by an adaptive cell (B
cell to T cell)
-Can have multiple epitopes
\.Antibody - ANSWERS✔--Protein secreted by B cells that specifically binds to an
epitope
, -Products of adaptive cells
-Bind to antigens
\.Epitope - ANSWERS✔--Region of antigen that is recognized by the specific B cell
or T cell
-One antigen can multiple epitopes (recognized by multiple adaptive cells)
-Amino acid sequence or structure recognized by a specific immune cell or
immune product
\.Pathogen Associated Molecular Patterns - ANSWERS✔--PAMPs or MAMPs
-How dies your body recognize microbes? -- have the ability to innately sense
certain molecular patterns
-We have evolved proteins on surface of some cells that can bind to specific
PAMPs that are found on surface of bacteria, fungi, parasites
-Ability to recognize when a bacteria is present
\.Cytokines and Chemokines - ANSWERS✔--Small discussible chemicals or
peptides that re used in cellular communication
-Made by cell in response to an infection
-Cytokine contain information; tells body about what is happening; diffuse out but
don't create a gradient--contain information that will activate (i.e. if you have a
bacteria then you need to activate neutrophil and then look for chemokine to take
them to site of infection)
-Chemokine directs movement; tells body where it is happening; create gradient
that immune cells use to migrate toward the site