8th grade ch. 5 sec. 4 noninfectious diseases
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Transcript of 8th grade ch. 5 sec. 4 noninfectious diseases
Objectives:1.What causes allergies?2.How does diabetes affect the body?3.What are the effects of cancer on the body?
noninfectious diseases• not spread from person to person
• not caused from microorganisms
• examples:
1. allergies
2. diabetes
3. cancer
1. allergy1. allergy• immune immune system system overly overly sensitive to sensitive to foreign foreign substancesubstance
allergen•substance that causes allergy
examples of allergens
pollenpet danderpet dander
Pet dander are tiny flakes of dead skin from family pets. It can cause sneezing, congestion, even asthma. These flakes can be airborne, but more often nestle into carpets and furniture.
histamine• chemical responsible for allergy
symptoms:
–sneezing
–watery eyes
asthma• respiratory passages narrow significantly
• can be caused by inhaling allergens
• pancreas fails to make enough insulin or body’s cells can’t use it properly
• high levels of glucose in blood
• glucose excreted in urine-body cells do not have enough glucose
2.
insulin
• chemical that enables body cells to take in glucose from blood & use it for energy
2 formsof diabetes
Type 1 Type 2
begins in childhoodor early
adulthood
more serious form
develops during
adulthood
• cells multiply uncontrollably
• destroys healthy tissue
3. cancer
oral cancer
causes of cancer1. inherited characteristics
(heredity)
2.environmental factors
3.carcinogens• tar• UV light
cancer treatments
surgery drugs radiation
Before and after cancer surgery
chemotherapy
radiation therapy
radiation therapy
cancer prevention
avoid tobacco
protect skin from sunlight
low fat diet
regularmedical
checkups
fruits &
vegetables