Flashcards in micro - test 3 Deck (60)
The study of the transmission, incidence, and frequency of disease.
The ability of a pathogen to produce disease by over coming the defenses of a host.
The degree of pathogenicity
When microbes gain access to issues through the skin and mucous membranes in bites, infections, and other wounds.
Poisonous substances produced by microganisms.
Toxins in the blood
The lacrimal apparatus protects....
The eyes from irritating substances and microorganisms
Granulocytes predominate during.....
The early stages of infection.
Monocytes predominate during...
The time when the infection subsides.
What can induce fever?
Bacterial endotoxins, interleukin-1 and tnf-alpha.
The COMPLEMENT SYSTEM consists of...
A group of serum proteins and activate one another to destroy microorganisms.
Low molecular weight substance that cannot form antibodies unless combined with a carrier molecule.
Produced in red bone marrow. These mature and become B-cells.
Involves antibodies..it is antibody mediated immunity!
Results when an antibody combines with epitopes on two different cells.
What shape is an antibody molecule?
Y shaped. The variable region binds the antigens and the constant region forms the base that distinguishes different classes of antibodies.
Antibodies consist of four....
Poly peptide chains - 2 light chains and two dark chains.
Most abundant in serum. Provides naturally acquired passive immunity - neutralizes bacterial toxins, involved in complement fixation and phagocytosis.
Involved in agglutination and complement fixation.
Protects mucosal surfaces from invasion by pathogens.
Bind mast cells and basophils involved in allergic reactions.
On B cells - deletes B cells producing antibodies against self.
An antigen antibody complex forms when an antibody binds to it's specific epitopes on an antigen.
Enhances phagocytosis of the antigen.
Th 1 cells
Th 1 cells activate cells involved in ...
Th 2 cells are associated with...
allergic reactions and parasitic infections.
active innate immunity and responses to extracellular bacteria.
T regulatory cells (treg) suppress..
..T cells against self.
Cytotoxic T cells....
Lyse or induce apoptosis in the target cells.