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EOG Review – GOAL 7

EOG Review – GOAL 7. Microbiology. Bacteria. Unicellular (living) Prokaryotic (no nucleus) Measured in micrometers Three basic shapes Ubiquitous (everywhere) Some are extremeophiles (hydrothermal vents, deep in ice cores, etc.). Viruses. Not made of cells (nonliving)

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EOG Review – GOAL 7

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  1. EOG Review – GOAL 7 Microbiology

  2. Bacteria • Unicellular (living) • Prokaryotic (no nucleus) • Measured in micrometers • Three basic shapes • Ubiquitous (everywhere) • Some are extremeophiles (hydrothermal vents, deep in ice cores, etc.)

  3. Viruses • Not made of cells (nonliving) • Measured in nanometers • Basic shapes: robotlike, cylinder, sphere, bullet • Cannot reproduce on own • Invade a host cell that it uses for reproduction

  4. Compare & Contrast BACTERIA VIRUSES Click here to add info Click here to add info Click here to add info

  5. Infectious Diseases Caused by Microbes • Answers: • 1. • 2. • 3. • 4. • 5. • 6. • 7. • 8. • 9. • 10. • 11. • Flu/Common cold • Cholera • Thrush • AIDS • Smallpox • Tuberculosis • Strep throat • Malaria • Staph • Athlete’s foot • E. coli (food poisoning) A) bacteria B) virus C) protist D) fungi

  6. Contagions vs. Mutagens CONTAGIONS MUTAGENS “mutation” Anything that changes the DNA of an organism Examples: Cancer Down syndrome FAS • “contagious” • Anything can causes an infectious diseases (can be spread) Examples: • Lyme disease (tick) • HIV (body fluid) • Malaria (mosquito)

  7. Spread of Infectious Diseases • Air • Person-to-Person (carrier – can transmit disease but shows no symptoms) • Contaminated Objects • Animals (vector) • Environmental Sources (soil, food, or water) Epidemic A disease that spreads over a wide geographic area Pandemic An epidemic that spreads worldwide

  8. Conditions Conducive to Disease • Genetics • Poor eating habits • Insect bites • Eating undercooked food • Environment (dirty, damp) • Population density • Stress • Malnourishment • Lack of exercise • Lack of sleep

  9. Reproductive Potential of Bacteria Under ideal conditions, a bacterial cell can divide (binary fission) every 20 minutes. Time Population Size 0 1 20 2 40 4 60 8 80 16 100 32 Remember….this is called “exponential growth”.

  10. Preventing & Treating Infections Preventing Treating Antibiotics (only work on bacterial infections….NOT viral) • Passive Immunity • Active Immunity (Vaccination) • Antimicrobial products Research is ongoing to find new vaccines and cures for infectious diseases.

  11. Biotechnology • the use of living organisms to make products used by people • used to develop medicine, vaccines, crops, etc. • helps NC’s economy: • creates many research-type jobs • helps agriculture • creates ethical issues • “just because we can, might not mean we should”

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