The Immune System
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Transcript of The Immune System
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The Immune System
A simple introduction to the variety of mechanisms used by our
bodies to combat disease
By Margi Friedman
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Why are we interested?
Has anyone in the room ever experienced an illness?
What is an immune system? What impact does the past study of
immunology have on us today?What possible outcomes could arise
from further study of the immune system?
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Immune System Vocabulary
Immune System
Immunity
Innate (non-specific) Immunity
Adaptive (specific) Immunity
Antigens
Humoral Immune Response
Cell mediated Immune response
•Pathogens•Macrophage•Phagocytosis•Lymphocytosis•Lymphocyte •B Lymphocyte•T Lymphocyte•Antibodies
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Mechanisms of Defense
Non-specific Responses: The innate immunity that we are born with. Includes the skin, mucous membranes, tears, saliva, and complement system responsible for inflammation & histamine response.
Specific Responses: The immunity we acquire through exposure to antigens. Immunity is acquired through the Humeral response & Cell-mediated response .
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Non-specific Responses
Mucous Membranes
(physical barriers)
THE SKIN
Dead skin(physical barrier)
Secretion of Bacterial Growth Inhibitor
(chemical barrier)
Tears & Saliva
Enzymes break down bacterial
walls(chemical barrier)
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Non Specific Response Compliment System
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Non-Specific ResponseMast Cells Activated
http://www.sumanasinc.com/webcontent/animations/content/inflammatory.html
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Specific (Acquired) ResponseHumoral and Cell Mediated
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How are we doing so far?
Share of the differences between specific and non-specific immunity?
How many people in the class have had an immunization?
How does vaccination work?
An assessment of what you know is a click away. Click on the document on the bottom right to open an assessment of what we’ve learned so far.
Document
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The Humoral response creates Antibodies
So, how do antibodies work?
B-lyphocytes interact with antigens to trigger the production of Antibody-
secreting plasma cells.
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Pathogen/Antigen
A pathogen is the microorganism capable of producing disease
An antigen is the protein on the surface of a pathogen that our bodies recognize as a foreign substance & triggers our immune system to respond.
There are two main classifications of pathogens that we will look at: Bacteria & Viruses
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How vaccination works
The immune system is exposed to an antigen in a form that it can easily combat.
This exposure triggers the Humoral response and activates B-Lymphocytes to begin a process that results in antibody production and memory of the antigen exposure.
A cellular memory is created so the body can quickly respond with huge amounts of antibody should that antigen show up again.
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Do you feel vaccination should be a requirement for everyone?
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When the Immune System isn’t enough
Medical treatment options exist as a result of years of research and development into our immune systems.
What are some of the effective treatments you’ve heard of in regards to various diseases?
Do you think someone with a compromised immune system, or an immune system that doesn’t operate very well, should receive vaccinations?
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What about people with compromised immune systems?
People with immune systems that are compromised (for example a person with AIDS), are not able to generate an effective response because of the fact their B-lymphocyte cells, or T-lymphocyte cells are either absent or ineffective.
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So much more to Immunology!
This is a very brief introduction to how our immune systems work.
Next up- Textbook readingYou get to do a project, stay
tuned for more information!
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References Alcano, Edward. Biology Coloring Book. New
York: Random House. 1998. Print Mackessy, Carol. Single Subject Test
Preparation Biology/Life Science. Prepared for Orange County Dept. of Education. Study guide in Print
http://crohn.ie/archive/primer/immunsys.htm
http://library.thinkquest.org/26360/immunevocab.html
http://nature.com
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References continued
http://Sumanasinc.com/webcontent/animations/biology.html
http://uhaweb.hartford.edu/BUGL/immune.htm