Unit C - Cell Biology and Disease
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How are infectious diseases spread?
Person to person Vector Contaminated food/water
Compare and contrast infectious diseases to contagious diseases
A contagious disease is an infectious disease that is spread from person to person.
What could people do to prevent spreading a contagious disease
Wash hands frequently Stay home when sick Cover your mouth when you cough/sneeze Get vaccinated
What is a PSA good for?
Educating a wide audience of people about a topic
If a person is a carrier, do they show symptoms? Are they infected?
No; Yes
If a person is not infected, do they show symptoms?
No
If a person is infected, do they show symptoms?
Yes
Why might carriers be more likely to spread a disease than sick people?
They don’t appear/feel sick, so they may not take necessary precautions (Typhoid Mary)
What did officials do to stop the bubonic plague in 1900?
• Destroyed homes/sprayed with disinfectant - Quarantined people
What did officials do to stop the bubonic plague in 1906?
• Killed rats • Rat-proofed buildings • Cleaned/took away garbage
What is the vector for the BP?
Flea
What is the vector for malaria?
Mosquito
How can malaria be avoided/prevented?
• Avoid standing water • Bug spray/insect repellent • Insecticides • Long sleeves • Bed nets • Pants
What are other diseases spread by a vector?
• Lyme • Rabies • Zika
How were people with leprosy treated before? Specific examples
• In the Middle Ages, people who had leprosy were considered dead. They were given a funeral service while still alive and forced to wander the streets and beg for food. • In the 1800s and early 1900s, they were quarantined in leper colonies. • In the Louisiana Leper Home, they were not allowed to make phone calls or vote.
Is leprosy hard to spread? Specific examples
• 90-95% of the population is thought to be immune • Only 5% of family members living with someone with leprosy will catch it. • Requires close contact over a long period of time to spread
The transmission electron and scanning electron microscopes can magnify objects over _____ times!
40,000
During the early 1900s, some people thought an infectious disease like the flu could be caused by nakedness, _________ food, irritating ______ in the atmosphere, unclean clothing, open windows, closed windows, old books, dirt, dust, or _________ causes.
contaminated; gases; supernatural
What does the germ theory state?
Germs cause infectious diseases
Why was the development of the microscope important in discovering the cause of infectious disease?
Microscopes enabled scientists to see the germs/microbes that cause infectious diseases.
Do bacteria have a nucleus?
No
What are the inputs of cellular respiration?
• Oxygen - Nutrients
What do cells obtain from respiration?
Energy
Where does cell respiration occur?
Mitochondria