Immunology Key Concepts

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Questions and Answers

Which of the following actions is NOT a direct result of the antigen-antibody complex?

  • Agglutination
  • Neutralization
  • Opsonization (correct)
  • Complement Activation

A patient is exposed to a new pathogen. Which type of immunity would be the FIRST to respond?

  • Acquired Immunity
  • Native Immunity (correct)
  • Passively Acquired Immunity
  • Cell-Mediated Immunity

After receiving a vaccine, which type of cells are responsible for producing the specific antibodies that provide long-term immunity?

  • Memory cells (correct)
  • Killer T cells
  • Helper T cells
  • Plasma cells

Which of the following best describes the role of Helper T cells in B cell activation?

<p>Secreting lymphokines to stimulate B cell cloning and antibody production. (A)</p> Signup and view all the answers

In the context of inflammation, what is the primary role of bradykinin?

<p>To increase vascular permeability and cause vasodilation. (A)</p> Signup and view all the answers

Which of the following describes the function of the membrane attack complex (MAC)?

<p>Puncturing the plasma membrane of cells, leading to lysis. (B)</p> Signup and view all the answers

What is the primary role of suppressor T cells in the immune response?

<p>To suppress the activity of other lymphocytes to prevent destruction of normal tissue. (C)</p> Signup and view all the answers

Which event directly follows adhesion in the sequence of cellular events during inflammation?

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

How do lymphokines contribute to the inflammatory response?

<p>By stimulating leukocytes and macrophages. (C)</p> Signup and view all the answers

Which of the following best describes the role of interferon in the inflammatory and immune response?

<p>It is produced by cells when invaded by viruses. (C)</p> Signup and view all the answers

Flashcards

Basophils

Releases histamine during inflammation, contributing to allergic reactions and inflammation.

Native Immunity

A non-specific, rapid immune response present from birth; the body's first line of defense.

Acquired Immunity

A highly specific immune response that develops after exposure to a foreign substance, leading to antibody production.

Passively Acquired Immunity

Immunity gained through the transfer of preformed antibodies, providing immediate but temporary protection.

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Primary Immune Response

The initial immune response that occurs upon the first encounter with a specific antigen.

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Antibody

An antigen-binding protein produced by B cells to neutralize or eliminate foreign substances.

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Antigen

Substances, usually proteins or polysaccharides, that are recognized by the immune system, triggering an immune response.

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Immunogens

Antigens capable of triggering an immune response.

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Haptens

Small molecules that can stimulate an immune response only when attached to a larger carrier protein or molecule.

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Major Histocompatibility Complex (MHC)

A group of genes that code for proteins on cell surfaces that distinguish between self and non-self.

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Study Notes

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