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Biology Chapter 24 (Immune System)

Terms in this set (94)

What physical characteristic of cuts allows platelets to stick and make scabs?
they have rough edges
What are platelets? What do platelets do?
sticky white blood cells; they make scabs
Where do all fluid products in your body come from?
the blood
What does the first line of defense consist of?
skin-acidic, waterproof protein and mucous membrane-mucus, nasal hairs, cilia, gastric juice, acid mantle of vagina, lacrimal secretion/flushing effects
What occurs when the skin is penetrated and tissue is damaged?
Inflammatory Response:
1) release of histamine
a) swelling and pain
1) dilation of blood vessels
2) secretion of plasma/interstitial fluid
b) redness and warmth
1) increased blood flow into the affected area
2) Phagocytes appear and eat foreign invaders
What are the signs of inflammation?
swelling (edema), redness, and warmth
What is Hemostasis?
maintaining blood volume
What is another name for the body's first line of defense? Is it specific or non specific?
Innate Immunity; non specific
What are interferons?
proteins produced by virus infected cells that help other cells resist the virus by giving them information on how to kill it
What is the complement system?
a group of 30 proteins that circulate in the blood plasma and lyse cell invaders
What are Phagocytes?
white blood cells that eat pathogens
What is a systemic inflammatory response?
a widespread inflammatory response (all throughout the body)
What is a non-specific line of defense?
a defense mechanism that doesn't identify/recognize different types of pathogens as anything but foreign and has one type of defense for every pathogen
What are fevers caused by? What do fevers do? How come high fevers are dangerous?
general infection; they slow down the reproduction of a virus; because they can denature important proteins in the body
What does the Lymphatic system consist of?
a branching network of vessels, many lymph nodes, bone marrow, tonsils, spleen, appendix, thymus, and adenoids
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