Microbiology for Dental Students: Aims and Objectives
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Questions and Answers

How do many microbes gain access to the body?

  • Through the circulatory system
  • Through the lymphatic system
  • Through the respiratory tract (correct)
  • Through the nervous system
  • Which part of the body is described as the largest organ in terms of surface area and weight?

  • Heart
  • Liver
  • Brain
  • Skin (correct)
  • What is the function of mucous membranes in the body?

  • To produce hormones
  • To aid in digestion
  • To line internal body cavities (correct)
  • To provide structural support
  • Which route involves direct deposition beneath the skin or membranes?

    <p>Parenteral route</p> Signup and view all the answers

    At which pH are most microbes destroyed in the gastrointestinal tract?

    <p>Acidic pH</p> Signup and view all the answers

    Which part of the body is affected by sexually transmitted infections if transmission occurs without cuts?

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

    How can some microbes gain access to the body through the skin?

    <p>By penetrating intact skin</p> Signup and view all the answers

    What can establish a parenteral route for microbes to enter the body?

    <p>Punctures and cuts</p> Signup and view all the answers

    When is the stage set for disease to occur when it comes to the number of invading microbes?

    <p>When many microbes are present</p> Signup and view all the answers

    What is an example of a bacterial pathogen that can initiate disease from more than one portal of entry?

    <p>Bacillus anthracis</p> Signup and view all the answers

    Which route of microbial entry into the body is associated with punctures and surgery?

    <p>Parenteral route</p> Signup and view all the answers

    How do bacterial pathogens penetrate host defenses?

    <p>Using capsules and cell wall components</p> Signup and view all the answers

    How does the capsule of bacteria resist the host's defenses?

    <p>By impairing phagocytosis</p> Signup and view all the answers

    Which bacterial component of Streptococcus pyogenes contributes to virulence by mediating attachment and resisting phagocytosis?

    <p>M protein</p> Signup and view all the answers

    What is the role of coagulases in bacterial virulence?

    <p>Clotting fibrinogen to protect the bacterium from phagocytosis</p> Signup and view all the answers

    Which process allows some pathogens to obtain free iron from the host?

    <p>Secreting siderophores to bind iron more tightly</p> Signup and view all the answers

    Which type of bacteria produces a waxy lipid known as mycolic acid to resist digestion by phagocytes?

    <p>Mycobacterium tuberculosis</p> Signup and view all the answers

    How do kinases contribute to bacterial virulence?

    <p>Digesting clots and allowing bacteria to move freely</p> Signup and view all the answers

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