Transcript What is wrong? - Hicksville Public Schools / Homepage

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: read pages 1029-1033,
page 1052 # 22
What is wrong?
Disease•the body is not working as it should
•The body is not in homeostasis
What is the common theme?
Disease in
humans may
result from
foreign invader
organisms
called…..
PATHOGENS
Pathogen: any disease causing organism
Pathogens
• Bacteria
• Viruses
• Fungi
• Parasites
Bacteria Characteristics
• Prokaryotes
• Unicellular organisms
• Lack most ORGANELLES, no
true nucleus.
Examples
• Strep throat
Salmonella – toxins
• Syphilis
What will the doctor
Give you?
Antibiotics
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.
Examples
• HIV
• Chicken Pox
• Influenza
Can you take antibiotics?
Antibiotics will not work on a
virus- they are specific for
bacteria.
Fungus
• Athlete’s foot
• Ring worm
• What can the doctor
Prescribe?
• Fungicides
Parasites
Organisms that feed
off of other
organisms
Examples:
tapeworm,
heartworm,
trypanosoma,
toxocara
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
How are pathogens transmitted?
Blood
Food
Animal
Sex
Air
Diagnosing – determine the
disease you have
Diagnosis is made based on
symptoms , examination and
testing
Prevention vs. Treatment
Prevention – ways to avoid getting the disease.
Treatment – ways to help people with a disease
to get better.
Besides pathogens, what else
can cause disease?
Toxic Substances
Organ Malfunction
Poor Nutrition
Inherited
Disorder
Risky Personal
Behavior