Quiz
Host-Microbes Interactions Ch 16
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Questions in this quiz (18)
1The intimate relationships between the microorganisms and the human body are an example of, meaning "living together?"
- ABiome unity
- BHomogeneity
- CColonialism
- DSymbiosis
2_____________ is the association in which one organism benefits at the expensive of the other.
- ACommensalism
- BParasitism
- CMutualism
- DMicrobiotism
3Which mode of transmission involves person-to-person contact?
- ADirect
- BIndirect
- CZoonoses
- DConvalenscence
4An example of indirect transmission is?
- APerson-to-person
- BAir, food, water
- Canimals to humans
- Dall of the above
5The time between exposures and onset of disease is called?
- ATransmission
- BVirulence factor
- CIncubation period
- Dpathogenic interval
6Which of the following statements about exotoxins are false
- Ais an example of an A-B toxin
- BCan be carried throughout the body via the bloodstream
- CAre excreted by viruses
- Dare proteins
7We can often make vaccines for the A protein so the toxin can't bind
- ATrue
- BFalse
8Which of the following are examples of exotoxins
- Adiphtheria
- Btetanus
- Cbotulism
- Dnone of the above
9GI flora that stimulates immunity and makes vitamins in the large intestine is what type of symbiotic association?
- ACommensalism
- BMutuallism
- CParasitism
- DNone of the above
10Which of the following statements about normal microbial flora is false?
- ABabies aquire a lot of their microbiota at birth.
- BThe stable presence of microorganisms on the body's surface is called microbial adherence
- CFlora is continually replaced until the best commensal relationship is established.
- DNewborns are susceptable to infection because their normal flora is not yet stable.
11Colonization?
- Aa microbe capable of causing disease
- Bdamage to the host cell
- Cmicrobe invasion of the host tissue
- Dthe growth of microbes on the host.
12Virulence?
- Athe growth of microbes on the host
- Bcauses disease only in hosts with impaired defenses
- Cthe characteristics that enable a microorganism to be a pathogen
- Da microbe capable of causing disease
13Strict pathogens?
- Acan cause disease in any host
- Bcan cause disease only in a host with impaired defenses
- Care noninvasive and do not cause infection
- Dnone of the above
14Which of the following about the importance of microbiota is correct?
- Amicrobial flora are usually negative for the host
- Bthey are invasive and normally causes infections
- Cthey compete with other pathogens for essential nutrients through competive exclusion
- Dthey do not produce toxins
15Which of the following are incorrect about Koch's Postulates?
- Athe microorganism must be present in every case of the disease
- Ba different organism must be recovered from the infected host
- Cthe organism must be grown in pure culture from the diseased host
- Dthe same disease must result if the organism is introduced into another susceptible host
16Moleculer Koch's postulates are used to establish the cause of infectious disease where Koch's postulate is used to identifiy virulence factors that contribute to disease.
- ATrue
- BFalse
17Microorganisms do not usually attach to humans cells because they are both hydrophilic and negatively charged.
- ATrue
- BFalse
18Which of the following is incorrect about the colonization of a pathogen?
- AAntibiotics treatment can discourage pathogen colonization.
- Bthe pathogen must either grow faster than the normal flora or attach more strongley
- Cthe pathogen must quickly change its metabolism to adapt to the new enviroment
- Dnormal flora can prevent attachment of pathogens
Information
- Description
- Ch 16 Lecture 17
- Author
- M L
- Language
- English
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