Viral Pathogenesis: Disease and Terminology
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Questions and Answers

What structures line the majority of the respiratory tract and move like oars to push mucus to the throat?

  • Alveolar macrophages
  • Cilia (correct)
  • Villi
  • Goblet cells

Where does gas exchange occur in the respiratory system?

  • In the alveoli (correct)
  • In the bronchioles
  • In the trachea
  • In the bronchi

Which tract is described as a hollow tube stretching from the mouth to the anus?

  • Gastrointestinal Tract (correct)
  • Nervous Tract
  • Respiratory Tract
  • Urinary Tract

What structures increase the surface area of the epithelium in the small intestine?

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

Which cell type is less abundant in the lower respiratory tract compared to the upper respiratory tract?

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

What is a characteristic feature of the alveoli of the lungs regarding cell types present?

<p>Absence of ciliated cells (D)</p> Signup and view all the answers

Which type of immune response is carried out by lymphocytes?

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

How do viruses gain entry into the body through the genital tract?

<p>By replicating in the epidermis and gaining access through small cuts or abrasions (B)</p> Signup and view all the answers

What is the main function of plasma B cells in the immune response?

<p>Produce antibodies against a specific antigen (B)</p> Signup and view all the answers

Which type of infections occur when a mother infects a fetus before its birth?

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

Which cells are primarily directed at intracellular infectious agents in cell-mediated immunity?

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

What is the main function of lysozymes in the immune response?

<p>Breaking down bacterial cell walls (B)</p> Signup and view all the answers

How can viruses gain access to the lower, dividing layers of skin for replication?

<p>Through small cuts or abrasions in the skin (D)</p> Signup and view all the answers

What is the term for the generational transmission of viruses from parents to their offspring?

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

Which immune response is characterized by physical barriers such as tight junctions in the skin and mucous membrane surfaces?

<p>Innate immune response (C)</p> Signup and view all the answers

At what stage in viral pathogenesis does shedding usually occur?

<p>Last stage in viral pathogenesis (C)</p> Signup and view all the answers

In which layer of tissue do viruses that replicate in the epidermis gain access through small cuts or abrasions?

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

How can viruses gain access to the placenta for congenital infections?

<p>Vertically transmitted from parents (C)</p> Signup and view all the answers

Which of the following best defines viral virulence?

<p>The ability of a virus to produce more severe disease in a susceptible host (A)</p> Signup and view all the answers

What is the role of mucus in the upper respiratory tract in relation to viral infection?

<p>Mucus traps inhaled particulate matter, including viruses, preventing their entry into the host cells (D)</p> Signup and view all the answers

Which statement about viral pathogenesis is most accurate?

<p>Viral virulence in intact animals should not be confused with cytopathogenicity for cultured cells (D)</p> Signup and view all the answers

What is the first step in viral pathogenesis?

<p>Entry and primary replication (C)</p> Signup and view all the answers

Which of the following is NOT a part of the respiratory tract?

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

What is the main function of goblet cells in the respiratory tract?

<p>They produce mucus that traps inhaled particulate matter, including viruses (C)</p> Signup and view all the answers

What does the term 'viral shedding' refer to?

<p>The time at which an infected individual is infectious to contacts (D)</p> Signup and view all the answers

Which of the following is NOT a mode of direct transmission for viruses?

<p>Transmission via mosquitoes (C)</p> Signup and view all the answers

What is a 'dead-end infection' in the context of viral infections?

<p>An infection that cannot be transmitted to other hosts (D)</p> Signup and view all the answers

What are 'fomites' in the context of viral transmission?

<p>Nonliving physical substances that can indirectly transmit virions (B)</p> Signup and view all the answers

What does the term 'arbovirus' refer to?

<p>Viruses that are transmitted by arthropods (B)</p> Signup and view all the answers

Which of the following is a characteristic of airborne transmission of viruses?

<p>Transmission via virions suspended in the air for long periods (D)</p> Signup and view all the answers

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