Human Immunity Lecture 5

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Questions and Answers

What percentage of plasma proteins are usually made up of immunoglobulins?

  • 30%
  • 10%
  • 40%
  • 20% (correct)

What is the function of the variable portion of an antibody?

  • Determines antibody's adherence to specific structures
  • Determines the antibody's properties in tissues
  • Determines the ease with which antibodies pass through membranes
  • Attaches specifically to a particular type of antigen (correct)

What is the main function of the constant portion of an antibody?

  • Determines the antibody's properties in tissues (correct)
  • Attaches specifically to a particular type of antigen
  • Attachments to specific structures within the tissues
  • Determine the ease with which antibodies pass through membranes

What do the letters 'Ig' in IgG, IgA, IgD, IgE, and IgM stand for?

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

Which class of antibodies constitutes about 75% of the antibodies of a normal person?

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

How many binding sites do IgM antibodies have?

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

What is the ability of the human body to resist almost all types of organisms or toxins that tend to damage tissues and organs?

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

What type of immunity does not develop until after the body is first attacked by a bacterium, virus, or toxin?

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

Which of the following is an example of innate immunity?

<p>Destruction of swallowed organisms by the acid secretions of the stomach (A)</p> Signup and view all the answers

What is the function of the special immune system in acquired immunity?

<p>To form antibodies and/or activated lymphocytes that attack and destroy the specific invading organism or toxin (C)</p> Signup and view all the answers

What are the antibodies produced by the immune system called?

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

What is the result of the interaction between the immune system and a specific invading organism or toxin?

<p>The invading organism or toxin is destroyed (B)</p> Signup and view all the answers

What are the two main ways antibodies act to protect the body against invading agents?

<p>By direct attack on the invader and by activation of the complement system (D)</p> Signup and view all the answers

What is the process by which multiple large particles with antigens on their surfaces are bound together into a clump?

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

What is the process by which antibodies cover the toxic sites of the antigenic agent?

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

What is the term for the type of immunity acquired through the action of antibodies?

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

What is the system that is activated by antibodies to destroy the invader?

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

What is the term for the direct attack of antibodies on invading agents?

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

What is the primary function of antibodies in the context of passive immunity?

<p>To provide temporary protection against disease (C)</p> Signup and view all the answers

How long do activated T cells obtained from another person last in the recipient's body?

<p>A few weeks (D)</p> Signup and view all the answers

What is the term for the transfer of antibodies or T cells to confer immunity?

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

What is the source of the antibodies or T cells used for passive immunity?

<p>The blood of someone else who has been actively immunized (C)</p> Signup and view all the answers

What is the duration of protection offered by antibodies in the context of passive immunity?

<p>2 to 3 weeks (A)</p> Signup and view all the answers

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