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WGU D311: Microbiology with Lab: Section 2
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WGU D311: Microbiology with Lab: Section 2
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WGU D311: Microbiology withLab: Section 2
What is a characteristic of rhizospheres? - -The rhizosphere is where plants
release organic compounds that can be metabolized by microbes into soil.
- Which environment would contain microbes that are psychrophilic? - -
Glaciers
- What is the role of nematodes in soil? - -They prey on bacteria, smaller
nematodes, fungi, and even plant roots.
- Which eukaryote is responsible for producing antibiotics to ward off
bacterial competitors? - -Fungi
- Which symbiotic relationship is an example of mutualism? - -The
relationship between humans and the Escherichia coli colonizing the human
gut.
- Which type of symbiotic relationship exists between the E. coli that inhibit
the human gut and the humans who utilize the vitamin K produced by E.
coli? - -Mutualism
- Describe resident microbiota. - -Resident microbiota constantly live on the
human body.
- Which relationship is exhibited by intestinal E. coli and their human host? -
-Mutualism
- Which type of disease is transmitted from animals to humans? - -Zoonotic
diseases
- Which type of disease is acquired in hospital settings? - -Nosocomial
diseases
- Which portal of exit can expel the most viral particles? - -Respiratory
- Which type of disease is sickle cell anemia? - -Noninfectious
- Which type of transmission occurs when tuberculosis is spread through
small particles expelled by a cough? - -Droplet transmission
- Which type of transmission occurs when pathogens are spread from
mother to child during breastfeeding? - -Vertical direct contact transmission
, - Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body? - -Biological vector transmission
- Which type of transmission occurs through contact with a fomite? - -
Indirect contact transmission
- Which infected host would be considered a passive carrier? - -A healthcare
professional who does not wash their hands after seeing an infected patient.
- How is Giardia lamblia, the causative of giardiasis, transmitted? - -
Contaminated food or water.
- Which organism is the definitive of Toxoplasma gondii? - -Cats
- Which disease is transmitted by animals but not arthropods? - -Rabies
- How can adhesins be described? - -Adhesins found on the surface of
pathogens bind to receptors of hist cells.
- Describe a portal of entry. - -Body features through which pathogens can
enter host tissue.
- Pathogens produce proteins to prevent the fusion of the phagosomes and
the lysosome (phagolysosome). Why does this virulence factor facilitate
invasion? - -It prevents the exposure of pathogens to lethal digestive
enzymes.
- Which action refers to a secondary infection? - -An infection by one
pathogen enables another pathogen to cause an infection.
- What differentiates signs from symptoms of disease? - -Signs are
measurable; symptoms are subjective.
- Which procedure does a clinician use to measure a symptom? - -Asking
patients to rate pain on a numerical scale.
- During which stage of an infection does a patient feel the worst? - -The
period of illness stage
- What defines the end of the incubation period for an infectious disease? - -
The appearance of nonspecific signs or symptoms of disease
- How does the epidermis help prevent infection and disease? - -It provides
a harsh environment for most pathogens and periodically sheds.
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