The Immune System: Secondary Defense
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Questions and Answers

What is the role of the immune system as the body's secondary defense?

  • Acting as a physical barrier against pathogens
  • Detecting and eliminating pathogens that bypass primary defenses (correct)
  • Generating antibodies to fight infections
  • Preventing pathogen entry into the body

Which primary defenses are complemented by the immune system's secondary defense?

  • Blood clotting
  • Digestive enzymes
  • Antibodies production
  • Skin and mucous membranes (correct)

What type of pathogens does the immune system's secondary defense detect and eliminate?

  • Bacteria, viruses, and fungi (correct)
  • Insects
  • Plants
  • Mammals

How does immunological memory benefit the immune system?

<p>It allows for a quicker and more effective response to previously encountered pathogens (C)</p> Signup and view all the answers

Which of the following best describes the main function of the immune system's secondary defense?

<p>Recognizing and neutralizing pathogens that evade primary defenses (D)</p> Signup and view all the answers

What is the primary function of the immune system when distinguishing between self and non-self?

<p>Targeting only foreign invaders for destruction (C)</p> Signup and view all the answers

Which of the following is NOT considered a type of microorganism that can provoke immune responses?

<p>Plants (B)</p> Signup and view all the answers

How do parasites differ from other pathogens in terms of deriving nutrients?

<p>Parasites derive nutrients from a host organism (C)</p> Signup and view all the answers

What is the immune system's response to abnormal body cells that have undergone mutations?

<p>Targeting them for destruction to prevent further harm (D)</p> Signup and view all the answers

What is another term for nonspecific immunity?

<p>Innate immunity (B)</p> Signup and view all the answers

Which type of immunity involves the production of antibodies and specialized immune cells tailored to target specific pathogens?

<p>Adaptive Immunity (A)</p> Signup and view all the answers

What are the primary components of nonspecific immunity?

<p>Innate defenses, such as skin and mucous membranes (D)</p> Signup and view all the answers

What distinguishes adaptive immunity from nonspecific immunity?

<p>Specific targeting of pathogens (D)</p> Signup and view all the answers

What distinguishes nonspecific immunity from specific immunity?

<p>Nonspecific immunity targets a wide range of pathogens. (B)</p> Signup and view all the answers

How does species resistance relate to nonspecific immunity?

<p>Species resistance is due to variations in nonspecific immune responses. (B)</p> Signup and view all the answers

Which statement accurately describes the inflammatory response?

<p>Inflammatory response helps contain infections and promote healing. (B)</p> Signup and view all the answers

What is the role of interferons in nonspecific antiviral defense?

<p>Interferons inhibit viral replication and spread to other cells. (B)</p> Signup and view all the answers

Which of the following is NOT a mechanical barrier that constitutes the body's first line of defense?

<p>Antibodies (C)</p> Signup and view all the answers

What triggers the body's inflammatory response when tissues are damaged from infection or injury?

<p>Release of cytokines (C)</p> Signup and view all the answers

Which of the following is NOT one of the classic signs of inflammation?

<p>Itchiness (D)</p> Signup and view all the answers

What is the primary goal of the inflammatory response in the body's nonspecific immune defenses?

<p>To promote tissue repair and eliminate pathogens (C)</p> Signup and view all the answers

Which immune cells are recruited to the site of infection or injury during the inflammatory response?

<p>Macrophages (D)</p> Signup and view all the answers

What is the main function of B cells in specific immunity?

<p>Producing antibodies to recognize and neutralize specific pathogens (A)</p> Signup and view all the answers

What is the primary role of antibodies produced by B cells in specific immunity?

<p>Recognizing and neutralizing specific pathogens or foreign substances (A)</p> Signup and view all the answers

How do T cells contribute to specific immunity?

<p>Directly attacking infected or abnormal cells (B)</p> Signup and view all the answers

What is the primary function of memory cells produced by B cells?

<p>Provide a faster and more robust response upon re-exposure (A)</p> Signup and view all the answers

What triggers B cells to start producing antibodies?

<p>Encountering antigens (B)</p> Signup and view all the answers

What is the role of antibodies produced by B cells?

<p>Neutralize or mark pathogens for destruction (C)</p> Signup and view all the answers

How do B cells contribute to humoral immunity?

<p>By producing antibodies against specific antigens (A)</p> Signup and view all the answers

What triggers the immune system to respond when antigens enter the body?

<p>Antigens (C)</p> Signup and view all the answers

Which type of white blood cell is responsible for producing antibodies?

<p>B-cells (B)</p> Signup and view all the answers

What is the primary function of antibodies in the immune system?

<p>Recognize and bind to specific antigens (B)</p> Signup and view all the answers

What term is used interchangeably with 'antibodies'?

<p>Immunoglobulins (C)</p> Signup and view all the answers

How long does it typically take for the immune system to generate a sufficient response of antibodies after antigens enter the body?

<p>7-10 days (D)</p> Signup and view all the answers

What is the unique characteristic of antibodies that allows them to interact with antigens in a highly specific manner?

<p>Specific structure (D)</p> Signup and view all the answers

What is the main function of cell-mediated immunity mediated by T cells?

<p>Targeting cancerous or virally infected cells (A)</p> Signup and view all the answers

Which body parts do T cells migrate to in order to encounter pathogens or abnormal cells?

<p>Spleen, lymph nodes, and circulation (D)</p> Signup and view all the answers

How do T cells actively contribute to the immune system's defense mechanism?

<p>Surveying the body for signs of infection or abnormal cells (D)</p> Signup and view all the answers

Which type of white blood cell is involved in targeting pathogens hidden within host cells?

<p>T cells (B)</p> Signup and view all the answers

In specific immunity, what do antibodies produced by B cells do to pathogens?

<p>Neutralize their harmful effects (A)</p> Signup and view all the answers

What distinguishes B cells from T cells?

<p>T cells act as 'cell thugs' to identify and destroy infected cells, while B cells mark pathogens with antibodies. (B)</p> Signup and view all the answers

What is the main difference between innate and acquired immunity?

<p>Innate immunity is non-specific, while acquired immunity is highly targeted. (C)</p> Signup and view all the answers

Which cells of the immune system are primarily responsible for the adaptive immune responses in acquired immunity?

<p>B cells and T cells (D)</p> Signup and view all the answers

What type of immune response involves inflammation and fever as part of its defense mechanism?

<p>Innate immunity (A)</p> Signup and view all the answers

What type of immunity involves receiving ready-made antibodies instead of producing them internally?

<p>Passive immunity (B)</p> Signup and view all the answers

Which process involves the body's immune system producing antibodies after being exposed to antigens?

<p>Active immunity (B)</p> Signup and view all the answers

What distinguishes passive immunity from active immunity?

<p>Active immunity requires exposure to antigens. (A)</p> Signup and view all the answers

Which situation involves active immunity?

<p>Getting infected with a pathogen (D)</p> Signup and view all the answers

What is the main purpose of artificial exposure through vaccinations or immunizations?

<p>To stimulate the immune system for future infection (C)</p> Signup and view all the answers

What is the key difference between live attenuated and killed (inactivated) vaccines?

<p>The viability of the pathogen in the vaccine (C)</p> Signup and view all the answers

Which statement accurately describes the process of vaccination or immunization?

<p>It leads to the creation of antibodies for future protection (D)</p> Signup and view all the answers

What is the primary advantage of live attenuated vaccines?

<p>They can stimulate a stronger immune response and provide longer-lasting immunity. (A)</p> Signup and view all the answers

Which type of vaccine contains only the antigens that best stimulate the immune system?

<p>Subunit vaccine (B)</p> Signup and view all the answers

In which type of vaccine are pathogens genetically engineered to produce desired antigens for vaccination?

<p>Recombinant vaccine (B)</p> Signup and view all the answers

Which type of vaccine refers to the process of weakening the virus while retaining its antigenic properties?

<p>Attenuated vaccine (A)</p> Signup and view all the answers

Which type of vaccine contains a weakened form of the pathogen capable of replicating but not causing disease?

<p>Killed vaccine (C)</p> Signup and view all the answers

Which type of vaccine contains inactivated pathogens incapable of causing disease but can still stimulate an immune response?

<p>Subunit vaccine (B)</p> Signup and view all the answers

What term is used to describe a vaccine that doesn't work properly due to mistakes during its making?

<p>Faulty Vaccine (A)</p> Signup and view all the answers

What is the consequence of giving too much or too little of a vaccine?

<p>Reduced Vaccine Efficacy (D)</p> Signup and view all the answers

Which type of vaccine contains a weakened form of the pathogen capable of replicating but not causing disease?

<p>Live Attenuated Vaccine (C)</p> Signup and view all the answers

What distinguishes a live attenuated vaccine from an inactivated (killed) vaccine?

<p>Pathogen Replication Capability (C)</p> Signup and view all the answers

How does chronic stress affect the immune system?

<p>It shrinks the thymus, weakening the immune system. (B)</p> Signup and view all the answers

In the context of immunization, what can weakened adrenal glands lead to?

<p>Weakened body's defenses. (A)</p> Signup and view all the answers

What role do corticosteroids play in impacting the immune system?

<p>Inhibit certain immune cells like lymphocytes. (C)</p> Signup and view all the answers

Which of the following can negatively impact an animal's immune system's response to vaccination?

<p>Taking certain drugs like prednisone (A)</p> Signup and view all the answers

Why might animals lacking functional B and T cells face challenges with their immune system?

<p>They cannot produce antibodies effectively (A)</p> Signup and view all the answers

Which factor is likely to reduce the effectiveness of a vaccine?

<p>Presence of a weakened immune system (A)</p> Signup and view all the answers

Which of the following factors can significantly influence the efficacy of a vaccine?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following statements about the role of genetics in immune response is accurate?

<p>Variations in genes related to antigen presentation and T cell activation can affect the immune response. (B)</p> Signup and view all the answers

What is the primary reason for the 'window of vulnerability' in newborn animals?

<p>Maternal antibodies are present but declining, interfering with vaccine effectiveness (A)</p> Signup and view all the answers

During the 'window of vulnerability', what is the relationship between maternal antibodies and the newborn animal's susceptibility to infections?

<p>Low maternal antibody levels leave the animal vulnerable to infections despite vaccination (B)</p> Signup and view all the answers

What is the primary purpose of vaccinating animals during the 'window of vulnerability'?

<p>To stimulate the animal's immune system to produce its own antibodies (A)</p> Signup and view all the answers

How does the anamnestic response contribute to maintaining herd immunity?

<p>By enhancing the immune system's ability to respond quickly after exposure (A)</p> Signup and view all the answers

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