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Ch 19
Lymphatic System
37
Anatomy
Undergraduate 3
07/21/2014

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Term
What is the primary function of the lymphoid system?
Definition
production, maintenance, and distribution of lympohcytes
Term
The lymphocytes are most important in?
Definition
The immune system?
Term
Where are lymphocytes produces?
Definition
Red bone marrow, peripheral lymphoid tissue, and thymus
Term
Lymphatic vessels commonly occur in association with
Definition
Blood vessels
Term
Lymphocytes respond to?
Definition
antigens
Term
Why are T cells called "T" cells?
Definition
Thymus
Term
___ are large lymphoid nodules that are located in the walls of pharynx?
Definition
Tonsils
Term
____ are clusters of lymphoid nodules deep to the epithelial lining of the small intestine?
Definition
Peyer's Patches
Term
Lymphoid organs differ from lymphoid tissues in what way?
Definition
The organs have capsules
Term
Dividing lymphocytes can be found in the____ of the lymphoid nodules
Definition
Germinal centers
Term
Leslie has a bad sore throat, and the lymph glands in her neck are swollen. What does this indicate?
Definition
The affected lymph nodes contain an increased number of lymphocytes
Term
Areas of the spleen that contain large aggregations of lymphocytes are known as?
Definition
White pulp
Term
The first line of cellular defense against pathogens are the ?
Definition
Phagocytes
Term
The cells that perform immunological surveillance are the ?
Definition
NK (natural killer) cells
Term
An inflammatory response is triggered when ____ cells release histamines and heparin.
Definition
Mast cells
Term
A sample of John's blood shows a high level of pyrogens. This would indicate that john___________.
Definition
is running a fever
Term
Immunity that is genetically determined and present at birth is called?
Definition
Innate
Term
Immunity that results from exposure to an antigen in the environment is called
Definition
naturally acquired active
Term
Immunity that results from antibodies that pass the placenta from mother to fetus is called?
Definition
Naturally acquired passive
Term
What are/is the role of antigen-presenting cells in immunity?
Definition
Activate T cells, display antigen fragments, process antigens, bind to antigens
Term
When an antigen is bound to Class I MHC molecules, it can stimulate a ____ cell.
Definition
Cytotoxic T cell
Term
The cells responsible for antibody-mediatd immunity are the_____ cells.
Definition
memory B cells
Term
The cells directly responsible for cell-mediated immunity are the______ cells.
Definition
Cytotoxic T cells
Term
In an experimental situation, a rabbit is exposed to a viral antigen to which is makes antibodies. These antibodies are then purified and injected into a human with the same viral disease. This is an example of______.
Definition
Passive immunity
Term
Lymphocytes that destroy foreign cells or virus-infected cells are ____ cells.
Definition
Cytotoxic T Cells
Term
Cells that help regulate that antibody-mediated immune response are _____ cells.
Definition
Helper T Cells
Term
B cells are primary activated by the activities of ____ T cells
Definition
Helper T cells
Term
The various classes of immunoglobulins are differentiated on the basis of their_______.
Definition
Heavy-Chain constant segments
Term
Immunoglobulins that are most abundant and are responsible for resistance against many viruses, bacteria, and bacterial toxins are______.
Definition
IgG
Term
Immunoglobulins that attach to an sensitize mast cells and basophils are?
Definition
IgE
Term
Immunoglobulins, formed of five subunits, that are the first antibodies to be produces in response to infection, are ?
Definition
IgM
Term
Immunoglobulins that are primarily found in glandular secretions such as saliva and tears are____?
Definition
IgA
Term
What happens during primary humoral response to antigens?
Definition
B cells may differentiate into plasma cells, B cells may undergo several rounds of mitosis before producing plasma cells and memory cells, antibody levels do not peak until 1 to 2 weeks after initial exposure, the first immunoglobulins to appear in circulation are of the IgM type.
Term
In routine examination, some blood is taken and analyzes. The results show a high IgM titer for mumps virus but a low IgG anti-mumps titer. This would indicate that the person....
Definition
recently infected with mumps.
Term
A crime scene investigator found that a biological fluid sample contains a large amount of IgA-type antibody. This fluid is probably....
Definition
tears or saliva
Term
Inappropriate or excessive immune responses to antigens are__?
Definition
allergies
Term
The human immunodeficiency virus (HIV) that causes the disease known as AIDS selectively infects ____ cells.
Definition
Helper T Cells
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