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Lymphatic System Quiz
Jenkins
55
Anatomy
10/26/2008

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Term
What does the lymphatic system do?
Definition
Recovers tissue fluid, identifies foreign agents, activates immunie response, returns fluid to bloodstream
Term
What are the major functions of the lymphatic system (3)?
Definition
Fluid recovery, immunity, lipid absorption
Term
Name four lymphatic organs.
Definition
Lymph nodes, tonsils, thymus, spleen
Term
Name two characteristics of lymph fluid.
Definition
Clear, colorless, less protein than plasma
Term
In order of small to large, name the lymphatic vessels.
Definition
Lymphatic capillaries, Collecting vessels, lymphatic trunks, collecting ducts
Term
Where does lymph enter the bloodstream?
Definition
The subclavian vein
Term
Lymphatic capillares are similar to blood capilaries except for this major difference:
Definition
Closed at one end
Term
What is the mechanism of lymph flow (4 items)?
Definition
Flows at low pressure and speed, moved along by rhythmic contractions of lymphatic vessels, valves prevent backward flow, flow aided by skeletal muscle pump
Term
Lymphedema is?
Definition
Swelling of tissue from swolen lymph vessels
Term
Lymphocytes represent what percentage of circulating WBCs?
Definition
20-30%
Term
What are the three types of lymphocytes?
Definition
T, B, NK
Term
What type immunited do T cell provide?
Definition
Cell Mediated immunity
Term
What are the three types of T cells?
Definition
Cytotoxic, Helper T cells, Supressor T cess.
Term
What are the majority of Lymphocytes?
Definition
T cells
Term
What type of immunity do B Lymphocytes give us?
Definition
Antibody mediated immunity
Term
NK T cells give us what type of immunity?
Definition
Immunological surveillance
Term
Dendritic cells do what?
Definition
alert immune system of foreign presence (in mucous membranes)
Term
Reticular cells in lymph organs and thymus help with?
Definition
phagocytosis and provide structure
Term
Where does lymphopoiesis occur?
Definition
Bone marrow, spleen, lymus, peripheral lymphoid tissue
Term
Are lymphatic organs well defined?
Definition
Yes
Term
What is the primary lymphatic organ?
Definition
Thymus
Term
What are the secondary lymphatic organs?
Definition
Lymph Nodes, Spleen
Term
What organ fileter lymph?
Definition
Lymph nodes.
Term
The lymph node is the site for _______ and _______ cell activation?
Definition
B and T
Term
What are the three main functions of the spleen?
Definition
Filters blood, Initiation of immune response, Blood reservoir, (also RBC disposal, blood cell production in fetus)
Term
In the spleen, what are the functions of the red pulp?
Definition
Sunuses contain RBCs, Very permeable to allow RBC re-aborbtion, RBC graveyard
Term
In the spleen, what is in the white pulp and what does it do?
Definition
Has sleeves of lyphoctes and macrophages, monitor blood for foreign agents.
Term
what are the patches of lymphatic tissue at the pharynx entrance called?
Definition
tonsils
Term
What are the functions of tonsils?
Definition
Guards against inhaled and injested pathogens
Term
What are the five tonsils?
Definition
2 palatine, 2 lingual, 1 pharyngeal
Term
The thymus is part of what two systems?
Definition
Lymphatic and Endocrine
Term
What are two functions of the Thymus?
Definition
House developing lymphocytes, secretes hormones that regulate lymphocytes
Term
What type of barrier does the cortex of the thymus have?
Definition
A blood-thymus barrier
Term
The medulla of the thymus is made of what type of cells?
Definition
Reticular epethelial cells
Term
What is the second line of defense against pathogens and is it specific or non specific?
Definition
WBC response, Inflamatory response. Non specific
Term
What is an interferon?
Definition
Small proteins secreted by activated WBCs when invaded by viruses.(a cytokine)
Term
Why is inflamation a good thing?
Definition
Limits spread of pathogens, initiates tissue repair, Removes foreign debris, protects from further injury
Term
What are four signs of infection?
Definition
Redness, Inflammation, Heat, Pain(actually a symptom)
Term
How many proteins make up the complement system?
Definition
11
Term
What are the two pathways of the complement system?
Definition
Classic and alternate
Term
What is the most important function of C1 of the complement system?
Definition
Activating C3 to become C3b
Term
What does C3b of the complement system do?
Definition
Attracts phagocytes, stimulates phagocytic activity, stimulation of inflamation
Term
What is the difference between edema and effusion?
Definition
Edema is swelling in tissue, Effusion is swelling in joints.
Term
B and T lymphatic cells cannot work without?
Definition
MHC proteins
Term
What are two classes of MHC proteins?
Definition
Class I (produced by nucleated cells, class II (antigen presenting cells)
Term
What does CD8 T cells do?
Definition
binds to MHC to activate.
Term
What enhances cytotoxic T cell maturation?
Definition
CD4 (complement system)
Term
What promotes B cell division?
Definition
CD4 (complement system)
Term
What does CD4 do?
Definition
enhances cytoxic maturation and promotes B cell division
Term
What activates MHC?
Definition
CD8
Term
What occurs in humoral immunity?
Definition
B cell sensitation, b cell activation
Term
The antigen/antibody complex does what four things?
Definition
Neutralization, Agglutination, Precipitation, Complement activation
Term
What are the two steps for cell mediated immunity?
Definition
presentation, recognition
Term
What are the two steps for humoral immunity?
Definition
Sensitation, activation (B cell)
Term
Primary immune response is?
Definition
Activation from 1st exposure (peak in two weeks)