Neutrophils and Macrophages in Infection Defense
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Questions and Answers

Which type of white blood cells are formed partially in the bone marrow?

  • Mast cells
  • Granulocytes (correct)
  • Lymphocytes
  • Plasma cells
  • What is the primary function of white blood cells in preventing disease?

  • Destroying invading bacteria or viruses by phagocytosis (correct)
  • Producing antibodies
  • Sensitizing lymphocytes
  • Forming plasma cells
  • Where are lymphocytes and plasma cells partially formed?

  • Lymph tissue (correct)
  • Thymus
  • Spleen
  • Bone marrow
  • What is the total number of white blood cells an adult human has per microliter of blood cell?

    <p>4,000 - 11,000</p> Signup and view all the answers

    Which type of WBC has the shortest life span circulating in the blood before wandering through the capillary membranes into the tissues?

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

    What is the main function of granulocytes and monocytes in protecting the body against invading organisms?

    <p>Releasing antimicrobial or inflammatory substances</p> Signup and view all the answers

    Which body fluid contains the enzyme pepsin and has a low pH due to the presence of hydrochloric acid?

    <p>Gastric juice</p> Signup and view all the answers

    What is the function of the enzyme lysozyme found in tears?

    <p>Destroys certain bacteria</p> Signup and view all the answers

    What is the role of interferons in response to viruses or tumor cells?

    <p>Block the replication of viruses</p> Signup and view all the answers

    What is the process by which neutrophils and monocytes can squeeze through gaps between the endothelial cells of the blood capillaries and postcapillary venules?

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

    What is the selective procedure that increases the likelihood of phagocytosis by neutrophils and macrophages?

    <p>Roughness of the particle surface</p> Signup and view all the answers

    What characteristic is especially important for neutrophils and macrophages in killing bacteria, even when the lysosomal enzymes fail to digest them?

    <p>Production of powerful oxidizing agents</p> Signup and view all the answers

    What is the main function of myeloperoxidase?

    <p>Converts hydrogen peroxide and chloride ions to hypochlorite</p> Signup and view all the answers

    What is the role of eosinophils in allergic reactions?

    <p>Detoxify inflammation-inducing substances and phagocytize allergen-antibody complexes</p> Signup and view all the answers

    Which substances are released by mast cells and basophils during allergic reactions?

    <p>Histamine, bradykinin, serotonin, heparin, and several lysosomal enzymes</p> Signup and view all the answers

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