mb 230 midterm 3-1

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mb 230 midterm 3-1
2015-02-10 00:18:03
mb 230 midterm
mb 230 3-1,midterm 3-1
mb 230 3-1 microbes & human body
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  1. Symbiosis
    The living together of unlike organisms.
  2. Types of symbiosis:
    • -Mutualism*
    • -commensalism*
    • -parasitism*
    • -competition
    • -neutralism
  3. Mutualism is where
    both organisms benefit
  4. Commensalism is
    where one benefits the other receives no significant benefit or harm
  5. Parasitism is
    where one benefits and one is harmed
  6. define Indigenous microbiota
    microbes which live in/on us indefinitely in commensal relationships
  7. 3 aspects of Indigenous micrbiota populations?
    • -Permanent populations (resident, more or less)
    • - Species & pop size mary from person-person
    • -can change over time
  8. list 3 types of commensal indigenous microbiota on humans
    Bacteria, fungi, protists

    -we have more bacteria in/on our bodies than human cells.
  9. define Transient microbiota
    Microbes that we pick up from our environment
  10. what types of relationships of transient microbiota do we pick up?
    • -commensal (most)
    • -parasitic
    • *we don't want sterile hands, because of good bacteria.
  11. What can the following circumstances cause: 
    -outgrowth of indigenous microbiotia
    -loss of indigenous microbiota-breakdown or suppression of immune system
    -medical treatment (antibiotics, anti-inflammatories, immunosuppressors etc)
    -injury: burns, wounds, surgery etc
    opportunistic pathogens
  12. Indigenous microbiota locations
    Anywhere where your body interacts with the environment.
  13. The following systems are all places where we can find___
    -nervous (eyes)
    -integumentary (skin)
  14. The following environments ____ for microbes to live.
    -Dry, Salty
    -extreme temperatures
    -inhibitory substances (oils, lysozyme)
    are hostile environments, or make it hard for microbes to live.
  15. Which body systems does she mention are partially covered in microbiota
    Genital, Urinary, & respiratory
  16. Body systems completely covered in microbiota
    digestive and skin or integumentary.
  17. 2 subsets of microbacteria that adapted to live on skin
    • -gram-positive bacteria 
    • -gram-negative and fungi
  18. established microbial growth
  19. detrimental colinization
  20. Indigenous microbiota colonize the body, and can cause ____ under certain conditions
    -staphylococcus aureus:
    opportunistic infections

    • -wound infections
    • -acne: pimples
  21. 2 main parts of respiratory system
    • 1) Upper respiratory tract: mouth nose throat.
    • 2) Lower respiratory tract: lungs
  22. where are microorganisms naturally covering in the two parts of the respiratory tract?
    Upper respiratory tract. The lower tract should always be sterile (otherwise it's infected).
  23. what's described:
    -warm, moist
    -aerobic and anaerobic regions
    -nutrient (esp. for fermentation)
    -Massive numbers and variety of microbes
    An excellent environment for many microbes
  24. What 5 body systems should be without indigenous microbiota, or should be sterile?
    • 1)Lymphatic
    • 2)endocrine
    • 3) circulatory
    • 4)muscular
    • 5) skeletal
  25. Pathogens are described as ___ ____, ___ part of indigenous microbiota, & organisms ___ of ___  ___ in host.
    • -Parasitic symbionts
    • -not part of indigenous microbiota
    • -organisms capable of causing disease in host