5th - Science Unit 4 Lesson 3 Flashcards
(22 cards)
Anything that interferes with the normal functions of the body.
Disease
An organism that is too small to be seen with just our eyes
Microorganism
The process of heating foods to high temperatures to slow the grow of bacteria
Pasteurization
A chemical that kills disease-causing bacteria.
Antibiotic
A preparation made from dead or weakened pathogens that can help prevent some diseases.
Vaccine
Where are microorganism?
Everywhere
Why are microorganism important?
- Provide larger organisms with some of the food and oxygen they need to survive.
- Return nutrients to the environment by breaking down dead organisms
What are some examples of unicellular organisms?
- All bacteria (but not all are microscopic)
- Protists such as Euglena, amoebas, paramecia
- Yeast (a fungi)
What are some examples of multicellular microorganisms?
- Most fungi such as mushrooms
2. Dust mites
What is the difference between unicellular and multicellular microorganisms?
Unicellular have only one cell where multicellular have more than one.
Some harmful bacteria, protists, and fungi can cause diseases or disease causing agents
Pathogens
What can microorganism cause?
Diseases
What are diseases caused by pathogens that can be passed from one organism to another?
Infectious diseases
What bacteria causes a disease called strep throat by attacking cells in the throat?
Streptococcus
Some diseases such as tetanus and scarlet fever are caused by what?
By producing poisonous substances called toxins
What are two types of bacteria that can attack the digestive system after someone was in contact with uncooked foods?
E.coli and Salmonella
What are some examples of diseases caused by fungi and protists?
- Athlete’s foot
- Dysentery
- Sleeping sickness
- Malaria
How does pasteurization help keep us safe from diseases?
Heating liquids, such as milk, to a high temperature eliminates the bacteria without significantly altering the liquid
Antibiotics are used to treat what?
Bacterial infections
Why must scientists develop so many different antibiotics?
Because each antibiotic works only for certain types of bacteria.
What uses dead or weakened pathogens to prevent you from getting certain diseases?
Vaccines
What is the best way to stop the spread of infectious diseases?
By washing your hands, you can remove the pathogens you may have picked up and help prevent the spread of diseases.