MBI 111 Exam 1 || Questions and 100% Verified Answers.
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Course
MBI 111
Institution
MBI 111
Colonization correct answers an attachment to and replication in/on a host
Infection correct answers a colonization of the body leading to damage
Disease correct answers any deviation from health
-not all disease is due to infection
-infection does not always cause disease
Symptoms corr...
MBI 111 Exam 1 || Questions and 100% Verified Answers.
Colonization correct answers an attachment to and replication in/on a host
Infection correct answers a colonization of the body leading to damage
Disease correct answers any deviation from health
-not all disease is due to infection
-infection does not always cause disease
Symptoms correct answers subjective evidence of disease (pain, headache)
Signs correct answers objective evidence of disease (rash, fever)
Why do microbes cause disease? correct answers -Pathogens evolved to cause human disease
-Disease symptoms develop equilibrium does not develop between the pathogen and host
-Humans are accidental hosts of microorganisms that normally occupy a different niche
Symbiosis correct answers a situation in which 2 populations of organisms interact in a close and
sustained association
-benefits: food, protection, support, other life-sustaining factors
Synergism correct answers two populations that live together and accomplish what neither could
alone
ex: lichens=fungus and algae; mitochondria and chloroplasts in animal and plant cells
Mutualism correct answers benefits BOTH organisms
ex: nitrogen-fixing bacteria living in plant root nodules
Commensalism correct answers one population benefits, the other neither benefits nor is harmed;
microorganisms that inhabit our inner and outer surfaces without harming us; benefit to host may
be unrecognized
Antagonism (parasitism) correct answers the relationship is beneficial to one organism,
HARMFUL to the other
ex: pathogens (microorganisms that cause human disease are typical pathogens/parasites)
Normal microbiota (normal flora) correct answers microorganisms that infect WITHOUT
causing disease
ex: mutualism or commensalism
Pathogenicity correct answers the ability to enter host tissues and cause disease
Virulence correct answers the DEGREE of pathogenicity of a particular parasite
ex: highly virulent= cholera, typhoid, Ebola
less virulent= common cold viruses NOT cause disease
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