Chapter 13 Flashcards
A non specific defense – reacts one way regardless
of what kind of agent is attacking the body.
Innate immune system
The study of adaptive immunity and how the
immune system responds to specific infectious
agents and toxins
Immunology
Produced when a person has and recovers from an infectious disease.
Naturally acquired active immunity
Immunity that develops when a person is
vaccinated.
Artificially acquired active immunity
When antibodies are passed from mother to
offspring via the placenta or breast milk.
Naturally acquired passive immunity
Immunity developed when antibodies are given to
a person.
Artificially acquired passive immunity
A substance the body identifies as foreign and
toward which it mounts an immune response.
Antigen
A protein produced in response to an antigen that is
capable of binding specifically to that antigen.
Antibody
When activated (by an antigen) a T cell gives rise to one of four different types of progeny. List these types
Helper T cells, Regulatory T cells, Cytotoxic T
cells, and Memory T cells
Helper T cells function to
activate macrophages, assist B cell processes,
and activate cytotoxic T cells.
Cytotoxic T cells function to
the destruction of virus infected cells and cancer cells
Helper T cells have a ______ co-receptor and
recognize antigen held on ______
CD4,MHC II
Cytotoxic T cells have a ______ co-receptor and
recognize antigen held on _______
CD8,MHC I
These cells control other T cell responses
Regulatory T cells
What are the three types of Antigen presenting
cells (APC’s)?
B cells, Macrophages, and Dendritic Cells.
______will internalize the antigen, process it,
complex it with MHC-II receptors and send it to
the surface of their membrane. Here the antigen
and receptor will be presented to a helper T cell
Antigen presenting cells (APC’s)
For a CD8 cytotoxic T cell to become activated it
must
recognize a foreign antigen combined with a
MHC-I receptor
How do cytotoxic T cells kill virus infected cells?
by the release of toxic granules
These cells lack specificity for antigens however, they function to kill virus infected cells and cancer cells
Natural Killer Cells
______cells synthesize and release antibodies
Plasma
Y shaped protein molecules composed of 4 peptide
chains
Antibodies
The reason why the secondary response happens so
fast is due to:
Memory cells that proliferate instantly and destroy
the pathogen before the onset of signs and
symptoms.
