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PC604 Exam 1, part 2
exam 1 part 2
17
Nursing
Graduate
10/26/2012

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Term
IgG
Definition
Most common and smallest of all immunoglobulins.
Major component in secondary immune response.
Goes across placenta.
Monomer
Term
IgM
Definition
Largest of all immuoglobulins. Pentamer.
Found in serum.
***Initial responder in primary immune response***
IGM is present when patient is Miserable
Term
IgD
Definition
very limited info
found in blood
found on surface on B cells where they function as b-cell antigen recptors
Term
Humoral Immunity
Definition
response to antigen involving B Cells to produce antibodies, IgG, IgM, IgA, IgD, IgE
Term
IgE
Definition
Least Abundant
Antigen receptors on B cells
Term
IgA
Definition
Mucosal
Found in Breastmilk
Term
Cell Mediated Immunity
Definition
T Lymphosites attack the antigen directly
Antigen presenting Cells
Memory cells - induce secondary immune response.
Lymphokine producing cells -> produce cytokines that induce macrophages.
Cytotoxic T cells - attack cells directly and destroys cells with foreign antigens.
CD4 (T-helper cells)- Regulatory, control Humoral and cell mediated response,

**Humoral and cell Mediated work together**
Term
MHC
Definition
Glycoprotein
Found in all cells except RBC
Like an ID bracelet or code used to distinguish self from non-self.
All Cells have different codes.
Term
Immune functions and Age
Definition
T-cell functions decrease (cell mediated)
There are the same number but the function decreases.
Delayed hypersensitivity decreases.
Circulating auto antibodies and immune complexes increase.
Term
Hypersensitivity
Definition
Type I- IgE mediated rxn: Allergic rxn, atopic dermatitis, asthma. Increased IgE

Type II - Tissue specific, 5 general mechanisms:
1) Cell may be destroyed by antibodies IgG or IgM attack ie Hemolytic Anemia.
2) Macrophages - Phagocytosis
3) Toxins produced by neutophils
4) ADCC Natural killer cells are destroyed.
5) Cell is not destroyed but malfunctions ie: Graves disease Myesthenia Gravis, graft/tissue rejection.

Type III - Immune complex Mediated, not tissue specific. ie: Serum Sickness, Glomeral nephrosis, Rhumatic fever, heart disease.

Type IV- Cell Mediated - ***only type of hypersensitivity that does not include antibodies. delayed response, may take 3-5 days to produce. ie: Poison ivy - urushiol- Hapton that binds with larger skin molecule - reacts with normal skin protein.
Term
Autoimmunity
Definition
The immune system recognizes self as non self ie:
System Lupus - Type II and III hypersensitivity. involves all body systems.
More women than men.
More blacks than whites.
S/S Malor rash, discord rash, photosensitivity, arthritis, serosis, renal disorders, neuro disorder, Hematologic disorder.
Term
Alloimmunity
Definition
One individual immune system produced and immune response to anther individual.
**Isoimmunity
Type II hypersensitivity mech 1

ie: Rh incompatibility, blood transfusion rxn
Term
bacterial protective mechanisms
Definition
Encapsulate: TB, Strep and Pneumonia

Exotoxins: TDap vaccines stop bacteria from producing exotoxins (protein byproducts from bacteria that damage cell membranes.)

Endotoxins: Gram negative bacteria, endotoxins are released from cell membrane when cell is destroyed or during treatment with antibiotics. Endotoxins are Pyrogenic- induce fever and activate an inflammatory response.
Term
Viral
Definition
No metabolism, must rely on host cell to reproduce
Term
Viral RNA
Definition
Polio and Parainfluensa
replicates in the cytoplasm of the infected host cell.
Term
Viral DNA
Definition
Hep B and Herpes
Requires the DNA Polyemerase of the host cell to replicate. The virus enters the nucleus of the cell.
Term
Virus - Retrovirus
Definition
HIV
Converts viral RNA to vital DNA using reverse transcriptinase in the host cell.
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