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May 16th Notes
Immunity and immune system
12
Biology
9th Grade
05/16/2011

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Term
Which parts forrm the immune system?
Definition
The spleen, thymus, lymphatic nodes and white blood cells.
Term
What are the 2 kinds of cells which form the immune system?
Definition
1. Phagocytes
2. Lymphocytes
Term
What are phagocytes?
Definition
Cells which eat/engulf the microorganisms and digest them with the help of lysosomes.
Term
What are the 2 kinds of Lymphocytes?
Definition
T. Killer Lymphocytes and T. Helper Lymphocytees
Term
What are T. Killer Lymphocytes?
Definition
Cells that break the cell membrane of pathogens or detoxify the toxic material.
Term
What are T. Helper Lymphocytes?
Definition
Cells that activate the phagocytes and B. Lymphocytes to take action against the anitgens.
Term
What are Antigens?
Definition
They may be proteins, lipids, glycolipids, carbohydrates, or any other toxic substance. Antigenss are any parrticles which are considered as foreign particles by the human immune system.
Term
What are antibodies?
Definition
They are composed of proteins and react against the foreign particles (antigens). Antibodies are specific in their reaction.
Term
What is the transplant of organs?
Definition
When organs like heart or kidneys are transplanted.
Term
What does the body's immune system do, when there is a transplant?
Definition
It will produce antibodies against it and start rejecting it, because all human beings have different tisssues except identical twins.
Term
What do immunosupprressive drugs do?
Definition
They are given to patients to suppress the immune system.
Term
Why should patients with transplants be isolated?
Definition
They should prevent other diseases from occuring.
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