Microbiology PNUR 202 Normal Flora and Pathogenic Organisms Quiz
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Questions and Answers

Which term is used to describe the microorganisms that populate the healthy human body and are harmless or even beneficial in normal circumstances?

  • Normal flora (correct)
  • Pathogenic organisms
  • Virulence factors
  • Commensals
  • What is the process through which a newborn rapidly acquires normal flora from food and the environment, including from other humans?

  • Fungal infestation
  • Bacterial invasion
  • Microbial colonization (correct)
  • Viral transmission
  • What bodily function do the normal flora participate in within the human body?

  • Coordination of muscle movements
  • Digestion of intestinal contents (correct)
  • Synthesis of red blood cells
  • Respiration of lung tissues
  • Which statement accurately characterizes the role of normal flora in the human body?

    <p>They are involved in digestion and immune defense</p> Signup and view all the answers

    What term is used to describe microorganisms that establish a long-term relationship with a host without causing harm?

    <p>Normal flora</p> Signup and view all the answers

    What is the term for the factors possessed by pathogenic organisms that enable them to cause disease?

    <p>Virulence factors</p> Signup and view all the answers

    Which part of the body has the lowest density of resident flora?

    <p>Stomach</p> Signup and view all the answers

    Which enzyme helps limit the bacterial population of the conjunctiva?

    <p>Lysozyme</p> Signup and view all the answers

    Which microorganism can enter the bloodstream following dental surgery and lead to potentially fatal infective endocarditis?

    <p>Streptococcus mutans</p> Signup and view all the answers

    Which part of the body supports a permanent bacterial population that regenerates even after vigorous scrubbing?

    <p>Skin</p> Signup and view all the answers

    Which part of the body is colonized primarily by S. epidermidis followed by S. aureus, aerobic corynebacteria, and Streptococcus pneumoniae?

    <p>Eyes</p> Signup and view all the answers

    Which bacterium can attach to and colonize plastic catheters and medical devices that penetrate the skin, sometimes resulting in serious bloodstream infections?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    Which microorganism constitutes less than 0.1 percent of the total population of bacteria in the intestinal tract?

    <p>Escherichia coli</p> Signup and view all the answers

    Which part of the body has a dense population of anaerobic microorganisms?

    <p>Intestinal tract</p> Signup and view all the answers

    Which microorganism colonizes the teeth and surrounding gingival tissue with its own particular species?

    <p>Streptococcus mutans</p> Signup and view all the answers

    What kind of bacteria can acquire any bacteria from the surrounding environment?

    <p>Transient flora</p> Signup and view all the answers

    What is another term for the microorganisms that populate the healthy human body and are harmless or even beneficial in normal circumstances?

    <p>Commensals</p> Signup and view all the answers

    Which bodily function do the normal flora participate in within the human body?

    <p>First line defense of the human immune system</p> Signup and view all the answers

    What term is used to describe microorganisms that establish a long-term relationship with a host without causing harm?

    <p>Commensals</p> Signup and view all the answers

    Which part of the body supports a permanent bacterial population that regenerates even after vigorous scrubbing?

    <p>Skin</p> Signup and view all the answers

    Which statement accurately characterizes the role of normal flora in the human body?

    <p>They help in digestion and immune defense</p> Signup and view all the answers

    What is the term for the factors possessed by pathogenic organisms that enable them to cause disease?

    <p>Virulence factors</p> Signup and view all the answers

    Which of the following body parts has the lowest density of resident flora?

    <p>Stomach</p> Signup and view all the answers

    Which microorganism can attach to and colonize plastic catheters and medical devices that penetrate the skin, sometimes resulting in serious bloodstream infections?

    <p>S. epidermidis</p> Signup and view all the answers

    What is the densest population of microorganisms in the human body?

    <p>Intestinal tract</p> Signup and view all the answers

    Which enzyme helps limit the bacterial population of the conjunctiva?

    <p>Lysozyme</p> Signup and view all the answers

    Which microorganism constitutes less than 0.1 percent of the total population of bacteria in the intestinal tract?

    <p>Escherichia coli</p> Signup and view all the answers

    Which part of the body supports a permanent bacterial population that regenerates even after vigorous scrubbing?

    <p>Skin</p> Signup and view all the answers

    What bacterium can acquire any bacteria from the surrounding environment?

    <p>E. coli</p> Signup and view all the answers

    $What part of the body is colonized by their own particular species such as Streptococcus mutans?$

    <p>Mouth and Nose</p> Signup and view all the answers

    What part of the body has a relatively low density of microorganisms due to gastric enzymes and acidic pH?

    <p>Stomach</p> Signup and view all the answers

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