HPP The Immune System I Quiz

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Questions and Answers

What is the primary function of physical barriers in the immune system?

  • To recognize specific pathogens
  • To prevent the entry of most microorganisms into the body (correct)
  • To produce a wide range of immune responses
  • To activate effector lymphocytes

What is the characteristic of nonspecific (or innate) immunity?

  • It provides a stronger defense against a specific pathogen
  • It provides the first defenses against pathogens regardless of the type of pathogen (correct)
  • It involves the activation of effector lymphocytes
  • It is acquired after birth

What is the function of leukocytes in the immune system?

  • To recognize specific pathogens
  • To produce a wide range of immune responses
  • To provide physical barriers against pathogens
  • To phagocytose foreign matter (correct)

What is the difference between specific and nonspecific immunity?

<p>Specific immunity provides a stronger defense against a specific pathogen, while nonspecific immunity provides the first defenses against pathogens (D)</p>
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What is the role of the spleen in the immune system?

<p>It filters the blood and removes pathogens (C)</p>
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What is the characteristic of adaptive immunity?

<p>It develops after birth and provides a stronger defense against a specific pathogen (B)</p>
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What is the primary function of sebum secreted by sebaceous glands?

<p>To lubricate the hair and inhibit bacterial growth (B)</p>
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What is the role of lysozymes in tears and sweat?

<p>To digest proteoglycans in the cell walls of bacteria (B)</p>
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What is the function of ciliated mucosa in the respiratory tract?

<p>To catch microorganisms in mucus and transport them out of the body (D)</p>
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What is the role of commensals in the gut?

<p>To prevent the attachment of pathogens and compete with them for essential nutrients (B)</p>
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What is the main function of leukocytes in the body?

<p>To protect the body against infection and disease (A)</p>
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What is the role of stomach mucous membranes in preventing infection?

<p>To produce acid that kills most microorganisms that enter the gut (D)</p>
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What is the primary function of the immune system?

<p>To eliminate potentially disease-causing agents (A)</p>
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Which type of immunity involves recognizing and eliminating materials foreign to the body?

<p>Adaptive immunity (D)</p>
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What is the main obstacle to successful organ transplantation?

<p>The immune system's recognition of 'self' (D)</p>
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Which process does the immune system participate in?

<p>Wound healing (C)</p>
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What does the immune system reject in addition to foreign materials?

<p>Healthy cells of 'self' (C)</p>
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Which component of the immune system regulates the intensity and duration of the immune response?

<p>Cytokines (C)</p>
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