Preventing Communicable Diseases Notes: Welcome to the Health 9 Lesson: Preventing Communicable Diseases. Please click the next button to continue. Notes: There are many ways to prevent communicable diseases.
Notes: In this lesson, you will learn to: Examine the ways the body protects itself against invading pathogens Develop strategies for caring for your immune system and preventing disease Analyze the ways in which technology has impacted the world in the prevention of communicable diseases Identify health-related community services related to disease prevention Notes: Everyday, your body is exposed to millions of pathogens. Your body manages to stay free of infection because of your immune system.
Notes: Physical and chemical barriers are the body's first line of defense. Notes: The immune system has two major defense strategies. The inflammatory response is general, or nonspecific; it works against all types of pathogens. Specific defenses work against particular pathogens.
Notes: The Inflammatory Response prevents further tissue injury and more blood flow to an area. The collection of fluid and white blood cells causes swelling and pain because of pressure on nerve endings. Notes: The immune system has two major defense strategies. The inflammatory response is general or non specific; it works against all types of pathogens. Specific defense work against particular pathogens.
The inflammatory response is a reaction to tissue damage caused by injury or infection. One type of cell that responds to injury is called a Phagocyte, a white blood cell that attacks invading pathogens. Notes: Specific defenses react to invasions as a result of the body's ability to recognize certain pathogens and destroy them. An antigen is a substance that is capable of triggering an immune response. The result of the immune response is immunity, the state of being protected against a particular disease. Notes: The immune response is a complex interaction between your body and an invading pathogen. it can be broken into eight distinct stages.
Notes: Lymphocytes are specialized white blood cells that coordinate and perform many functions of specific immunity. There are two types of lymphocytes, T cells and B cells. There are different types of T cells with different functions. They all work together to protect against infection. In conjunction with the work of T cells, lymphocytes called B cells produce antibodies which are proteins that act against a specific antigen. Notes: Your immune system actually has a "memory". Some T cells and B cells that have been activated by antigens become memory cells.
Notes: Click the image to view the video. Notes:The immunity your body develops to protect you from measles and other diseases is called active immunity. Passive immunity is receiving antibodies from another person or animal.
Notes: Your health behaviors can greatly reduce your chance of contracting a disease or getting an infection. When you keep your body strong and healthy, your immune system is better able to fight off pathogens. Taking positive steps in every area of your health will give you a boost needed to reduce your chance of illness.
Notes: There are four types of vaccines: 1. Live viruses are made from pathogens grown under special lab conditions to make them lose most of their disease causing properties. 2. Killed viruses use inactivated pathogens. 3. Toxoids are inactivated toxins from pathogens. 4. New and second-generation vaccines are being developed by scientists using new technologies.
Notes: Vaccines help prevent the spread of communicable diseases by reducing the number of people who may become infected. When you are vaccinated against a disease, you show that you know strategies for health enhancement and risk reduction. Make sure your vaccinations are current. 2. Quiz
2.3 Vaccines have influenced the health status of individuals, families, communities, and the whole world.