Medecine and Diseas Study Questions

Topics: Immune system, Antibody, Lymphocyte Pages: 2 (496 words) Published: February 20, 2012
Medicine and Disease
Study Questions 1-10

1. Describe the role of the macrophage in the immune response. They are known as the vulture cells randomly engulf and destroy bacteria, cell debris or foreign matter.

2. State the origin and purpose of lymphocytes.
The immune cells, or lymphocytes as well as macrophages provide the specific mechanism for the identification and removal of foreign material. Natural killer cells are lymphocytes distinct from the T and B lymphocytes. They destroy, without any prior exposure and sensitization, tumor cells and cells infected with viruses.

3. Compare active natural immunity and passive artificial immunity, describing the causative mechanism and giving an example. Active natural immunity may be acquired by direct exposure to an antigen, for example, when a person has an infection and then develops antibodies. Active artificial immunity develops when a specific antigen is purposefully introduced into the body, stimulating the production of antibodies. For example, a vaccine is a solution containing dead or weakened organisms that stimulate the immune system to produce antibodies but does not result in disease itself.

4. What is the purpose of a booster vaccination?
A booster is an additional immunization, given perhaps 5 or 10 years after initial immunization, that reminds the immune system of the antigen and promotes more rapid and effective secondary response. Booster immunizations are currently used for tetanus.

5. Describe the purpose of gamma globulins.
A plasma protein containing the immunoglobulins that are responsible for the immune- responses.

Medicine and Disease
Study Questions 1-10

6. Where is LGA found in the body?
It is found in secretions such as tears and saliva, in mucous membranes, and in colostrum to provide protection for newborn child.

7. Explain how immune deficit develop.
The human immunodeficiency virus (HIV) destroys the CD4 cells, thus crippling the...
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