Summary Week 5 Immune System.docx Week 5 1. Describe components of the immune system by completing the following chart (see theory): (½ point each for total of 3.5 points) Innate immunity Description/Function Immediately prevent the spread and movement

Week 5


1. Describe components of the immune system by completing the following chart (see
theory):
(½ point each for total of 3.5 points)


Description/Function
Immediately prevent the spread and movement of foreign
Innate immunity pathogens throughout the body



Adaptive immunity Destroy invading pathogens and any toxic molecules they
produce.

Neutralizes pathogens such as viruses and bacteria by
IgG binding to key pathogen surface proteins and preventing
interaction of the pathogen with host cells.


IgM The control of B-cell activation

First line of defense in the resistance against infection, via inhibiting
bacterial and viral adhesion to epithelial cells and by neutralization
IgA
of bacterial toxins and virus, both extra- and intracellularly.

Antibodies produced by the immune system; These antibodies
travel to cells that release chemicals, causing an allergic reaction.
IgE


The thymus is a specialized organ that directs the development
Thymus and selection of t cells which direct adaptive immunity.




2. What is the primary mode by which a macrophage engulfs pathogens? (1/2 point)