Chapter 23 Lesson 3 Page 638 Lesson 4 page 645

What is the inflammatory response? A reaction to injured tissue or infection. Area will swell ,turn red, have pain and maybe get a fever This is part of your non specific responses of your immune system

Immune system Network of cells , tissues and organs and chemicals that fight pathogens

What are 2 kinds of barriers that help to keep you safe from pathogens Physical and Chemical

What is a example of a chemical barrier Enzymes in tears Salt in tears and sweat Gastric juices, acids found in stomach

What are examples of physical barriers Skin, Hair, eye lashes, eye brows Cillia Ear wax

What are phagocytes White blood cells that attack invading pathogens (germs) they surround the germs and destroy it with special chemicals. Pus, a mass of dead white blood cells and damaged tissue and dead germs may build up at the site

What are antigens Substances that can trigger an immune response. They are found on the surface of the pathogen or in toxins of the pathogen

What are lymphocytes and name 2 kinds Specialized white blood cells There are 2 kinds. B cells and T cells

What are 4 kinds of lymphocytes B cells- makes antibodies- a protein that acts against antigens, and only one who can destroy a pathogen Helper T cells- make B cells and Killer T cells start to reproduce themselves Killer T cells- they destroy infected body cells. Supressor T cells- They turn off the helper T cells when the infection is gone

What is an antibody? Where do they come from? What do they do? A protein that acts against antigens By attaching themselves to antigen and mark it for destruction Destroy pathogens Block viruses from entering body cells B cells make them

What is active immunity Develops from natural processes, like when you have had a disease or have been around some one has been sick and also artificial means. Like from a vaccination A dead or weakened pathogen that are put into a body to stimulate an immune response

What is passive immunity When your body receives antibodies fdrom another person or animal. This type of immunity is temporary Like when a baby has antibodies from its mothers blood or breastmilk

Lesson 4

Why is it important to track communicable diseases? So that we know how many people have certain diseases and where they are so we can get the right medicines or vaccines to the right areas of the world. So we can prevent people from getting sick

What is an emerging infection A contagious disease whose occurrence is humans has increased within the past 2 decades (20 years) or threatens to increase in the near future.

How is an epidemic different from a pandemic? Epidemic is an outbreak of a disease that affects many people in the same area or place at the same time. Like a lot of people with the flu all at one time in Waukee would be an epidemic in Waukee. Pandemic is a global outbreak of an infectious disease. The whole planet.

Giradia Microorganism that effects the digestive system. RWI- Recreational Water Illnesses are most common

E- Coli Bacteria caused . Theses bacteria live in an animals intestinal tract, and some how get into our food and water. IF food such as meat is cooked WELL done the germ will be destroyed and will not be a threat to humans.

West Nile Virus Carried by mosquitos.

SARS Severe Acute Respiratory Syndrome