Internal Mechanical Barriers and Pathogen Protection
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Questions and Answers

What is the function of healthy mucous membranes and skin as barriers?

  • To eliminate bacteria through hydrochloric acid secretion
  • To release pathogen-killing and tissue-repairing substances
  • To produce protein-digesting enzymes
  • To stop pathogens from entering the body (correct)
  • What prevents bacterial growth in skin secretions?

  • Protein-digesting enzymes in the stomach
  • Sebum containing compounds harmful to bacteria (correct)
  • Lysozyme present in lacrimal fluid
  • Hydrochloric acid in the saliva
  • Which enzyme is responsible for eliminating bacteria in saliva and lacrimal fluid?

  • Lysozyme (correct)
  • Pathogen-killing enzyme
  • Protein-digesting enzyme
  • Hydrochloric acid
  • What is the main function of phagocytes in the body?

    <p>To kill pathogens that manage to get past the mechanical barriers</p> Signup and view all the answers

    What is sometimes considered as a general defensive reaction in the body?

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

    Which substance helps in killing pathogens and repairing tissues as part of the body's second line of defense?

    <p>Chemical compounds and phagocytes</p> Signup and view all the answers

    What is the function of natural killer cells?

    <p>Patrol the body's blood and lymphatic system and kill cancer cells and virus-infected bodily cells</p> Signup and view all the answers

    What is the role of the lysosome?

    <p>Break down or digest the vacuole's contents when it fuses with its enzymatic components</p> Signup and view all the answers

    What is chemotaxis related to?

    <p>White blood cells</p> Signup and view all the answers

    Which type of cells can contribute to the inflammation brought on by allergic responses?

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

    What are the Five Cardinal Signs and Major Symptoms of Inflammation?

    <p>Redness, heat, swelling, loss of function, and fever</p> Signup and view all the answers

    Which cells are put in place at potential entry points for bacteria into tissues?

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

    What occurs every time bodily tissues are injured?

    <p>Inflammatory response</p> Signup and view all the answers

    What is the role of membrane mucous according to the text?

    <p>Acts as a robust physical barrier to microorganisms on the skin when it is intact</p> Signup and view all the answers

    What are natural killer cells able to recognize and react against?

    <p>Tumor cells and virus-infected cells</p> Signup and view all the answers

    What is the function of white blood cells according to the text?

    <p>Travel in the direction of pathogens or areas of tissue injury</p> Signup and view all the answers

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