unit 9-17 quiz
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unit 9-17 quiz

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@PreEminentLucchesiite6923

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Questions and Answers

A roundworm that can infect the digestive tract and bloodstream, and is shed in feces

  • Spike
  • Provirus
  • Prion
  • Nematode (correct)

    • A viral genome that lies dormant in the host cell

  • Spike
  • Provirus (correct)
  • Prion
  • Nematode

    • An animal that transmits infectious microbes

  • Prion
  • Nematode
  • Vector (correct)
  • Oncogene

    • A protein that can cause a fatal brain disease in humans and animals

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

    True or False: A systemic mycosis describes a fungal infection of the hair, skin or finger nails.

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

    Which of the following statements correctly describes a function of the complement system? (Note: this is a multiple select question. You must choose all of the correct answers.)

    <p>The complement proteins bind to bacterial cells and increase the likelihood of phagocytosis</p> Signup and view all the answers

    Which of the following statements best describes the process of clonal expansion?

    <p>B lymphocytes multiply and differentiate in response to stimulation by a T helper cell</p> Signup and view all the answers

    True or False: Invading microorganisms can produce pyrogens, which are molecules that induce fever, causing the body temperature to rise in response to infection.

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

    True or False: Naked viruses usually enter into a host cell through fusion with the animal cell membrane.

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

    We have enzymes in our tears, saliva and mucous called ___________ that degrade a part of the bacterial cell wall, and thus help to protect us from infection.

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

    When discussing the function of an antibody, the term “neutralization” means that:

    <p>Antibodies coat the surface of viruses and toxins to block their attachment sites</p> Signup and view all the answers

    Which of the following is NOT true of viruses?

    <p>All viruses can add their genetic material to one of the host's chromosomes allowing them to lie dormant in the cell</p> Signup and view all the answers

    The term ___________________ describes a molecule that can only activate a B cell that has been stimulated by a helper T cell.

    <p>T-dependent antigen</p> Signup and view all the answers

    A gene defect prevents the patient from producing lymphocytes

    <p>Severe combined immunodeficiency disease</p> Signup and view all the answers

    A virus infects and kills helper T cells

    <p>Acquired immunodeficiency syndrome</p> Signup and view all the answers

    Cytotoxic T cells attack and destroy cells in the pancreas

    <p>Type 1 diabetes mellitus</p> Signup and view all the answers

    Antibodies attack the Rh antigen on blood cells

    <p>Hemolytic disease of the newborn</p> Signup and view all the answers

    A vaccine made from only the capsule of a pathogenic bacterium, would best be described as a(n):

    <p>Polysaccharide vaccine</p> Signup and view all the answers

    Antibiotic resistance is one of the biggest problems faced by modern healthcare. Which of the following statements correctly describes a mechanism by which antibiotic resistance arises? (This is a multiple select question. Choose all of the correct answers.)

    <p>Some bacteria alter their cell structures so that antibiotics no longer bind</p> Signup and view all the answers

    Molecules located at the tips of fimbriae that allow bacteria to attach to and colonize the surface of host cells are known as:

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

    A farmhouse well is contaminated with feces from cattle grazing near by. A family drinks the water from the well, and they all get sick, experiencing symptoms of fever and diarrhea. This type of transmission would best be described as:

    <p>Indirect transmission</p> Signup and view all the answers

    True or False: Vancomycin, a very narrow spectrum antibiotic that is active against penicillin resistant bacteria, would be a good choice for treating a COVID-19 infection.

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

    Why is it relatively difficult to develop antiprotozoan medications?

    <p>Because there are very few structural differences between the cells of a protozoan and the cells of the human body</p> Signup and view all the answers

    True or False: The ID50 is the number of cells of a microorganism that must be administered to cause death in 50% of experimentally infected lab animals.

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

    A patient, who is believed to be at risk of contracting botulism from eating improperly canned food, is injected with horse serum antibodies to protect against the botulism toxin. Unfortunately, the patient's own immune system produces antibodies to the horse serum. The antibodies stick to the antigens in the horse serum, and then get trapped in the joints and kidneys leading to arthritis and kidney damage. This type of immune reaction would be classified as:

    <p>Type III hypersensitivity: Immune complex mediated</p> Signup and view all the answers

    The president of the United States was recently diagnosed with COVID-19. In an attempt to help him recover, his doctors injected him with an experimental treatment called 'Regeneron'. According to the company, Regeneron consists of two specific laboratory produced antibodies that attach to and neutralize the coronavirus. No one really knows right now, how important this treatment was in the President's recovery. But if it worked, this type of immunity would best be described as:

    <p>Artificial passive immunity</p> Signup and view all the answers

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