LO: SWBAT understand and explain how our body comes under attack. DN: List some ways in which you...
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![Page 1: LO: SWBAT understand and explain how our body comes under attack. DN: List some ways in which you can get sick. What causes you to be sick? HW: Article.](https://reader036.fdocuments.in/reader036/viewer/2022070407/56649e3a5503460f94b2c684/html5/thumbnails/1.jpg)
LO: SWBAT understand and explain how our body comes under attack.
DN: List some ways in which you can get sick. What causes you to be sick?
HW: Article Summary Due Friday
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What is wrong?
Disease-
•the body is not working as it should
•The body is not in homeostasis
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What is the common theme?
Disease in humans may result from
foreign invader organisms called…..
PATHOGENS
Pathogen: any disease causing organism
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Pathogens
• Bacteria
• Viruses
• Fungi
• Parasites
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Bacteria Characteristics
• Prokaryotes• Unicellular organisms• Lack most ORGANELLES, no
true nucleus.
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Examples
• Strep throat• Salmonella – toxins
• Syphilis
What will the doctorGive you?
Antibiotics
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Virus• A VIRUS IS NOT A CELL (IT IS NOT
ALIVE)• DNA or RNA + Protein Coat• Very small, smaller then a CELL.• They can only reproduce INSIDE a cell.• A virus works by injecting its DNA into a cell,
turning the cell into a virus producing factory.
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Examples• HIV
• Chicken Pox• Influenza
• Can you take antibiotics?
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Antibiotics will not work on a virus- they are specific for
bacteria.
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Fungus
• Athlete’s foot• Ring worm
• What can the doctorPrescribe?
• Fungicides
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Parasites Organisms that feed off of other organisms
Examples: tapeworm, heartworm, trypanosoma, toxocara
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Host: The organisms that the pathogen is living/feeding off of
Vector: What is transmitting the pathogen.
A vector could be living or nonliving.Examples: other animals, insects, water, desk
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How are pathogens transmitted?
Blood
FoodSex
AirAnimal
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Diagnosing – determine the disease you have
Diagnosis is made based on symptoms , examination and
testing
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Prevention vs. TreatmentPrevention – ways to avoid getting the disease.
Treatment – ways to help people with a disease to get better.
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Besides pathogens, what else can cause disease?
Organ MalfunctionToxic Substances Inherited
Disorder
Risky PersonalBehavior
Poor Nutrition
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Zoonotic Diseases
•A disease of animals that is transmissible to humans
•Ex:–West Nile Virus–Rocky Mountain Spotted Fever–Hookworm–Toxoplasmosis
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Epidemic
Sharp rise in incidence of an infection or disease
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PandemicVery widely distributed epidemic
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Endemic
Normally present in a certain geographic area or part of an area