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33 Cards in this Set

  • Front
  • Back
What are the 5 types of leukocytes?
Which type is most numerous in the bloodstream?
Which can carry out phagocytosis?
neutrophil and lymphocyte
Which type can become a macrophage?
What are the parts of the lymphatic system?
WBC, lymphatic system, thymus gland, lymph nodes, spleen
What is filtered by the lymph nodes
lymph fluid that been squeezed out of the bloodstream
What is filtered by the spleen?
the blood
Your body has 3 levels of defense
1) external barriers
2) non-specific defenses
3) specific defenses
Which parts of your body are external and which are truly internal
external- mouth
internal -intestines
What are some of the barriers employed by your body?
skin and mucus membranes
Non specific defenses include ______, ________, _______, _______, and various chemicals produced by the body specifically for defense
fever, inflammation, phagocytosis, natural killer cells
Why are these tatics termed "non-specific"?
b/c they work on every invader the same (same kind of response)
What are the characteristic hallmarks of inflammation?
warm to touch
How can inflammation help you?
When inflammation occurs it releases hystamine that increases capillary size and bloodflow, phagocytes come with blood to kill bacteria and help heal
Specific defenses involve immunity both _______ or ________.
antibody mediated or cell mediated.
A healthy immune system demonstrates four characteristics: ________,_______,______,______
specificity, diversity, tolerance, memory
Define specificty
every different foreign invader (antigen) if fought by different t-cells & b-cells
define diversity
you produce an immense array of t-cells and b-cells
define tolerance
your immune system can distinguish b/w self and non self
define memory
a memory of past infections protects against future encounters
Antibody-mediated immunity
also called humoral immunity, is carried out by b-lymphocytes which mature in the bone marrow.
clonal selection
plasma b-cells produce and release antibodies, while memory b-cells are reserved for later encounters with a particular antigen
What is an antigen?
a foreign invader
What is an antibody?
large, y shaped protein molecules that is specific for each type of antigen in response to exposure
what are the characteristics of antibodies?
bind with the antigen to inactivate, clump cells together, and encourage phagocytosis
There are several classes of antibodies, some can be secreted in mother's milk, while others can cross the placenta
with one exception, antibodies are not formed against a particular antigen unless the immune system has come to contact with that antigen
What are the functions of the killer t cells (cytotoxic)
binds to cancer cells, secrete poreforming proteins that make holes in cancer cells so it collapses
What are the functions of the helper t-cells
secrete interleukins
stimulate non-specific defense (encourages phagocytosis)
2. stimulate b-lymphs (start producing antibodies)
3. stimulate killer t cells
what are the functions of the memory t cells
store the antibody for later encounters
what do helper t cells help with?
help communicate b/w different wbc
What is the difference b/w active and passive immunity
active immunity is when you have to do something to produce antibodies
passive immunity is when you recieve antibodies
example of active immunity
example of passive immunity
breast feeding