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Health Unit 5

Communicable Diseases

QuestionAnswer
Define communicable disease disease spread from 1 organism to another thru environment
define pathogen agent that causes the disease
What is infection when pathogens invade body and multiply
What is disease condition when body is unable to fight the infection
What are the ways a communicable disease can be passed? direct, indirect (contaminated surfaces, vectors) , airborne
4 examples of direct transmission touching, biting, kissing, sexual
Name the different types of pathogens if they can be cured Virus, bacteria, fungi, protozoans
2 main differences between bacteria and virus Bacteria don't need a host cell, viruses do; bacteria can be cured with antibiotics viruses can't
What are universal precautions? actions taken to prevent infection by assuming that everyones bodily fluids are contaminated
What is the body's first line of defense against infection? Give examples Non specific physical and chemical barriers ex. skin, mucous, saliva, tears
What is the body's second line of defense against infection? explain it non specific inflammatory response, swollen reaction to tissue damage to prevent further damage + pathogens
What is the body's 3rd line of defense against infection? Give examples specific defense; lymphocytes (T and B cels) and antigens
What is the role of Helper T , Killer T, and Suppressor T? helper = alerts immune system Killer = kills infected cells Suppressor = deactivates immune system when infection gone
What is the role of the B cells known as plasma and memory cells? Plasma: create antibodies that neutralize pathogens Memory: "remembers" infections
how do vaccines work? dead/weakened pathogen injected into body so it can develop immunity
Created by: mhaq.16
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