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Questions and Answers
What is the primary function of B lymphocytes in acquired immunity?
What is the primary function of B lymphocytes in acquired immunity?
- Activate T lymphocytes for cell-mediated immunity
- Produce antibodies to attack invaders (correct)
- Produce enzymes that destroy bacteria
- Regulate the immune response to allergens (correct)
Which type of immunity primarily targets viral infections?
Which type of immunity primarily targets viral infections?
- Humoral immunity involving B cells
- Cell-mediated immunity involving T cells
- Autoimmunity resulting from immune dysfunction (correct)
- Natural immunity from prior infections
What characteristic must substances have to be considered antigenic?
What characteristic must substances have to be considered antigenic?
- High molecular weight, typically 8000 or greater (correct)
- Ability to evoke a fever response
- Presence of antibodies
- Molecular weight of less than 8000
Which statement correctly describes epitopes in relation to antigens?
Which statement correctly describes epitopes in relation to antigens?
Which of the following best differentiates humoral and cell-mediated immunity?
Which of the following best differentiates humoral and cell-mediated immunity?
Flashcards
Acquired Immunity
Acquired Immunity
The ability of the body to recognize and fight specific invaders, like bacteria or viruses.
Humoral Immunity
Humoral Immunity
A type of acquired immunity where B lymphocytes produce antibodies that target invaders.
Cell-Mediated Immunity
Cell-Mediated Immunity
A type of acquired immunity involving T lymphocytes that directly destroy infected cells.
Antigen
Antigen
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Epitope
Epitope
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Study Notes
Acquired (Adaptive) Immunity
- Specific immunity against invaders is called acquired or adaptive immunity.
- Two main types:
- Humoral immunity: B-cells produce antibodies (globulins) that attack invaders.
- Cell-mediated immunity: T-cells destroy invaders through cell-to-cell contact.
Antigens
- Acquired immunity is triggered by invaders.
- Each invader has unique chemical compounds (proteins or polysaccharides).
- These unique compounds are called antigens, triggering an immune response
- Antigens typically have a high molecular weight (8000 or above) for a substance to trigger an immune response
- Antigenicity depends on recurring molecular groups (epitopes) on the surface of the large molecule (proteins and polysaccharides are almost always antigenic).
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