2+Immunology

 Alissa, Aliza, Alex

Immunology = =


 * The Immune System:**


 * Lymph circulates white blood cells through the body, as does blood.
 * Once born, ALL red and white blood cells are created in the bone marrow (before birth, they can come from the mother across the umbilical cord.)
 * There are two major categories of immunity: Specific and Non-Specific.

Non-Specific Immunity:


 * The first line of defense is skin and mucous.
 * The second line of defense:
 * 1) Neutrophils: the most abundant white blood cells.
 * 2) Monocytes: live longer than Neutrophils and undergo phagocytosis of antigens.
 * 3) eosinophils: destroy larger parasitic invaders. These are the cells that cause most allergic reactions.
 * 4) Natural killer cells: destroy your own cells that have already been infected.

Specific Immunity:


 * The third and last line of defense.
 * Lymphocytes come in two varieties: B cells and T cells.
 * B cells:
 * 1) Are humoral defense, i.e., they are located in the interstitial fluid between cells.
 * 2) secrete antibodies to attack antigens.
 * 3) IgM: The first antibody at the scene of an infection.
 * 4) IgG: The most abundant antibody. Crosses the placenta between mother and child.
 * 5) IgA: found in milk, sweat, and tears.
 * 6) IgD: may turn some B cells into memory cells.
 * 7) IgE: involved in allergic reactions, trigger the release of histamine.
 * T Cells:
 * 1) Involved in cell-mediated immunity - they help other cells fight infections (Also called "Helper T-Cells")
 * 2) Bind to natural cells or infected B Cells and destroy them by lysing.
 * 3) HIV attacks these.

Your Acquired Immunity

Presentations **
 * [[file:Immunologyforclass.ppt]]

Videos **The Inflammatory Response** [|**http://www.youtube.com/watch?v=uNG-jZxvhcg**] []
 * Basic Overview**

Magic School Bus: Inside ralphie

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