Francesca

Francesca

1) Write **7 most important or meaningful science words** that help you to understand immunology. Give a **simple** **definition** to each words.
 * 1) Inflammatory response.
 * The defenses are signalled to go to the wound or where the pathogens are.
 * 1) Humoral response.
 * When B lymphocytes (bone marrow) are split into two different types of cells in the // epitope // - memory & plasma cells.
 * 1) Leukocytes.
 * A form of white blood cell, it is part of the second line of defense in the immune system and it kills all bacteria that it senses.
 * 1) Antibodies.
 * There are two types of antibodies, membrane-bound and free antibodies.
 * 1) Phagocytes.
 * Another type of white blood cell, it also kills bacteria that it senses by engulfing them - creating a phagosome.
 * 1) Lymphocytes.
 * Another type of white blood cell, two types - B cells and T cells. They are part of the third line of defense.
 * 1) Epitope.
 * The B cells are one of the lymphocytes in the third line of defense. They are connected to a type of antibody - membrane bound antibody. A pathogen has a cell on it, the nucleus, and when the antibody from that B cell and the nucleus connect, it's called the //epitope.//

2) In 30 minutes, showcase/demonstrate your best or deepest understanding of immunology, with explanation; begin with a question or title (e.g. how __ works?) __

Immunology is the system inside a human's body that control all the pathogens that enter it. The immune system has 3 lines of defense that are used to kill the bacteria, two of which are in the non-specific section* and the other one, in the specific section*. The non-specific section is the part where the defenses don't know what type of bacteria they are attacking and the specific section is the part where the defenses //do// know what they are attacking. The first line of defense, which is part of the non-specific section consists of skin oil that is quite acidic, stomach acid and mucus membranes in the nose. Once a pathogen enters the body it has to face these defenders. If the pathogens get past the first line of defense, they have to face the second line of defense - the phagocytes and the inflammatory response. The third line of defense consists of the lymphocytes - B cells and T cells. As I said before, the third line of defense is part of the specific section so it knows what type of bacteria it's looking for, etc.

These defenses help the body by eliminating all types of pathogens (bacteria) from the body.