Immunology Flashcards
Immune system organs include what?
Skin, MM, spleen, red bone marrow, lymph nodes, MGCNALT, tonsils, Peyers patches, thymus
The spleen consists of ____ and ____ pulp
White and red
The white pulp of the spleen has phagocytes that react to what in the bloodstream?
Antigens
The red pulp of the spleen has macrophages that removes what?
Worn and damaged blood cells
The spleen is a reservoir for what?
RBCs
The red bone marrow is responsible for what?
All (white) blood cell production
Kuppfer macrophage
Liver
Microglial macrophage
Brain
Osteoclasts macrophages
Bone/marrow
Dendritic macrophages
Skin/LN
Histiocytes macrophages
Connective tissue
Alveolar macrophages
Lungs
Langerhans macrophages
Skin
Littoral macrophages
Spleen
The medulla of the LNs contains _______ that eat up what 3 things?
Macrophages; cancer cells, antigens, foreign debris
What causes LN to enlarge?
Lymphocyte multiplication and macrophage accumulation
Define MALT
Mucosa - associated lymphatic tissue
Define CALT
Conjunctiva - associated lymphatic tissue
Define NALT
Nasopharynx-associated lymphatic tissue
Define Galt
Gut - associated lymphatic tissue
Functions of MALT/GALT/CALT/NALT?
Identify antigens, mount immune response
MALT/GALT/CALT/NALT are clusters of what type of tissues?
Lymphoid tissue
Tonsils are part of _ALT but more specifically _ALT?
MALT; GALT
What is the function of the tonsils?
Destroy foreign material
Peyers patches are a part of the _ALT and more specifically _ALT
MALT; GALT
Peyers patch are aggregations of _____ in the _____ intestine
Lymphoid; small
What cells mature in the Thymus
T-cells (T lymphocytes)
Thymus is only present in what animals?
Young
The innate immune system is _____, non-_______ response
Fast; nonspecific
What makes up the innate immune system?
Skin, MM, inflammation, fever, phagocytosis, complement system, cytokines, NK cells
How does the skin function?
Physical barrier
How does the MM function?
Produce mucus, tears, saliva, etc
What initiates inflammation?
Histamine
Why is vasodilation important?
Diapedesis
What are the clinical signs of inflammation?
Heat, redness, swelling, pain, loss of function
Fever helps move what?
Chemical mediators
How does a fever help eliminate a pathogen?
Gets too hot to support pathogen growth
What cells are capable of phagocytosis?
Neutrophils, macrophages
What helps attract phagocytes?
PAMP receptor, complement system
Complement system becomes active in the presence of what?
Antigen or antibody attached to an antigen
Functions of the complement system?
Trigger inflammation
Define opsonization
Attaches something to flag something for phagocytosis
Cytokines includes what?
Interleukins, interferon, chemokines
Interleukin 1 =
Tells T cells to release more IL
Interleukin 2 =
Causes T cell production
Interleukin 4&6=
Causes B cells to clone and produce memory/plasma cells, and antibodies
Interferon helps to stop what?
Viral replication
What do chemokines do?
Stimulate movement of leukocytes from blood to the injury/inflammation site
NK cells are what type of cell?
Lymphocyte
How do NK cells kill target cells?
Bind to cell to induce cellular changes leading to apoptosis
Adaptive immune system consists of what?
B lymphocytes, t lymphocytes
B lymphocytes are a part of which branch of adaptive immunity?
Humoral
b lymphocytes produce what?
Immunoglobulin (Ig) or antibodies
5 types of b lymphocytes
IgM IgG IgA IgE IgD
B lymphocyte IgM is what %?
5%
B lymphocyte IgG is what %?
75%
B lymphocyte IgA is what %?
20%
B lymphocyte IgE is what %?
Trace
B lymphocyte IgD is what %?
trace
Which b lymphocyte is produced during 1st exposure?
IgM
Which b lymphocyte can cross the placenta and is the most abundant?
IgG
What b lymphocyte is found in mucosa?
IgA
Where do b lymphocytes migrate?
LN and spleen
Once activated, b lymphocyte clones can become _____ or _____.
Memory;plasma cells
Memory or plasma cells mass produce what?
Antibodies
T Lymphocytes are a part of what branch of adaptive immunity?
Cell mediated
T lymphocytes originate where?
Bone marrow
T lymphocytes migrate to where to mature?
Thymus
Once mature, t lymphocytes enter the bloodstream and migrate where?
LN and spleen
Once activated, t lymphocyte clones can become what?
Memory cells, helper T cells, cytotoxic T cells, regulatory T cells
Helper T cells secrete what?
Cytokines
Cytotoxic T cells do what?
Attach to antigenic markers on cells and destroy them
Regulatory T cells do what?
Prevent B cells from transforming into plasma cells
Active immunity is achieved what 2 ways?
Exposure or vaccine
Passive immunity is achieved what 3 ways?
Placenta, colostrum, IV
Define virulence
Degree of pathogenicity
Define hypersensitivity
An overreaction of the immune system that causes tissue damage
Type 1 hypersensitivity
Animal is sensitized, second exposure is severe, food/milk/drug/vax/parasite allergy, inhalant/atopic dermatitis
Type 2 hypersensitivity
Immune mediated DZs
Type 3 hypersensitivity
Immune complex: blue eye, pneumonitis, glomerulonephritis, FIP, rheumatoid arthritis (or 4)
Type 4 hypersensitivity
Contact dermatitis