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Immune System

Stack #78334

Immune SystemAnswers
What does the immune system do? It defens our body against germs and diesease causing organisms every day.
What is the function of the immune system? It keeps people healthy and prevents infections.
What do problems with the immune system lead to? It leads to illness and infection.
What are the two defenses that your body uses to prevent infection? First and Second lines of defense.
What are pathogens? Disease causing organisms.that your body's line of defenses protect against.
What are the two types of First Line Defenses External and Internal
What are external first line defenses The skin is a barrier that prevents many patholgens from entering your body.
How do pathogens enter the skin? Through broken skin and mucous membranes.
Name mucous membranes. Mouth, nose, eyes, other mucous membranes.
Name the internal first lines of defense Respiratory system, digestive system, and circulatory system.
How does the respiratory system act as a first line of defense? It traps pathogens with cilia and mucus and these pathogens are removed when you cough or sneeze.
How does the digestive system act as a first line of defense? It has several defenses against pathogens including saliva, enzymes, hydrochloric acid, and mucus.
How does the circulator system act as a first line of defense? It contains white blood cells and red blood cells that surround and digest foreign organisms. White blood cells defend the body against infectious disease.
What happens if the white blood cells cannot destroy the bacteria fast enough? You can develop a fever.
What is the difference between first line defenses and second line defenses? First line defenses work against harmful substances and ALL types of pathogens, 2nd line defenses are SPECIFIC and work against specific pathogens.
What is the immune system? The complex group of defenses (first and second).
Compare the immune system to a castle or Lord of the Rings. Skin, resp., dig,, circ. systems are 1st line defenses (like moat). Pathogens are bad guys. Once 1st line defenses are breached 2nd line take over with specific defenses.
How does the condition of skin affect pathogens? Skin's perpiration contains substances that can slow growth of some pathogens. Secretions from skin's oil glands and perspiration are acidic and can kill pathogens.
Name the two types of immunity. Specific immunity and active immunity.
What is active immunity? Your body makes its own antibodies in response to an antigen.
What are antigens? Molecules that are foreign to your body.
What is passive immunity? When antibodies that have been produced in another animal are introduced into your body.
What is a vaccine? A form of an antigen that gives you immunity against a disease.
Can a vaccine cure a disease? No a vaccine can only prevent a disease not cure it.
What is vaccination? It is the process of being injected with a vaccine.
What happens after your body has been injected by a vaccine? After your body has been injected with a vaccine, your body forms antibodies against that pathogen.
After vaccination, what happens if your body encounters the same pathogen? Your blood stream already has antibodies that are needed to fight and destroy it.
What is tetanus? A disease caused by a common soil bacteria.
What does the tetanus bacteria do? It produces a chemical that paralyzes muscles.
Why do children receive the tetanus vaccine? To stimulate antibody production to the tetanus toxin.
Created by: jcarruth