Question 1

The lack of susceptibility to diseases of other species in humans may be due to the

Accepted Answer

A)   secretion of exotoxins.
B)   presence of endotoxins.
C)   action of IL-2.
D)   lack of receptors that are recognized by adherence factors.

Question 2

Colonization of the body is inhibited by

Accepted Answer

A)   the shedding of skin cells.
B)   the movement of mucus by cilia.
C)   peristalsis.
D)   the flushing action of the urinary tract.
E)   All of the choices are correct.

Question 3

The suffix -emia means in the

Accepted Answer

A)   body.
B)   lymph.
C)   interstitial tissue.
D)   blood.

Question 4

The normal microbiota provides protection against potentially harmful organisms and stimulates the immune system. Why would the immune responses to members of the normal microbiota cross-react with pathogens?

Accepted Answer

A)   Because one person's normal microbiota is another person's pathogen-when we pick up 'normal' microbes from a different person, they will always cause infection within us.
B)   Because pathogens are oftentimes more virulent strains of our own normal microbial flora, so they will 'look' roughly the same to our immune system (and be acted upon by our immune responses) .
C)   Because the normal flora keeps the adaptive immune responses tuned-up, active, and ready to respond to broad, general categories of microbes (i.e. Gram positive vs. Gram negative microbes, viruses, etc.) .
D)   Because the immune system is a 'use it or lose it' system. If it isn't used on a regular basis, we completely lose the ability to respond to pathogens. The normal flora keeps the system going so that it can be ready to respond to such pathogens when we're exposed to them.

Question 5

A disease-causing microorganism or virus is referred to as a(n)

Accepted Answer

A)   avirulent infection.
B)   colony.
C)   commensal.
D)   pathogen.

Question 6

During incubation and convalescence a person may still spread infectious organisms.

Accepted Answer

A) True 
 B)False

Question 7

A relationship in which one partner benefits and the other is harmed is termed

Accepted Answer

A)   commensalism.
B)   parasitism.
C)   independence.
D)   mutualism.

Exam 16: Host-Microbe Interactions

During incubation and convalescence a person may still spread infectious organisms.

Correct Answer
verified

The lack of susceptibility to diseases of other species in humans may be due to the

Correct Answer
verified

The normal microbiota provides protection against potentially harmful organisms and stimulates the immune system. Why would the immune responses to members of the normal microbiota cross-react with pathogens?

Correct Answer
verified

Colonization of the body is inhibited by

Correct Answer
verified

A disease-causing microorganism or virus is referred to as a(n)

Correct Answer
verified

A relationship in which one partner benefits and the other is harmed is termed

Correct Answer
verified

The suffix -emia means in the

Correct Answer
verified

Exam 16: Host-Microbe Interactions

During incubation and convalescence a person may still spread infectious organisms.

Correct AnswerverifiedShow Answer

The lack of susceptibility to diseases of other species in humans may be due to the

Correct AnswerverifiedShow Answer

The normal microbiota provides protection against potentially harmful organisms and stimulates the immune system. Why would the immune responses to members of the normal microbiota cross-react with pathogens?

Correct AnswerverifiedShow Answer

Colonization of the body is inhibited by

Correct AnswerverifiedShow Answer

A disease-causing microorganism or virus is referred to as a(n)

Correct AnswerverifiedShow Answer

A relationship in which one partner benefits and the other is harmed is termed

Correct AnswerverifiedShow Answer

The suffix -emia means in the

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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