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Questions and Answers
Which of the following is the primary mechanism behind acute allergic reactions?
Which of the following is the primary mechanism behind acute allergic reactions?
- Direct attack by cytotoxic T cells on the allergen.
- Release of histamine due to an immediate immune response. (correct)
- Delayed hypersensitivity reaction mediated by memory T cells.
- Formation of antigen-antibody complexes that activate complement.
How do vaccines confer immunity against specific pathogens?
How do vaccines confer immunity against specific pathogens?
- By providing the body with antibodies produced by another organism.
- By directly neutralizing the pathogen upon entry into the body.
- By creating a physical barrier that prevents the pathogen from entering the body.
- By introducing weakened or inactive pathogens to stimulate an immune response. (correct)
What immunological process underlies autoimmune disorders?
What immunological process underlies autoimmune disorders?
- The immune system attacking the body's own cells and tissues. (correct)
- The inability to mount an immune response against foreign pathogens.
- An excessive response to common environmental antigens.
- A deficiency in the production of antibodies.
A patient experiences a skin rash several days after being exposed to a new cosmetic product. Which type of allergic reaction is most likely responsible?
A patient experiences a skin rash several days after being exposed to a new cosmetic product. Which type of allergic reaction is most likely responsible?
Why are booster shots sometimes required for vaccines?
Why are booster shots sometimes required for vaccines?
Flashcards
Autoimmune Disorders
Autoimmune Disorders
Disorders where T cells and antibodies mistakenly attack the body's own cells.
Acute Allergy
Acute Allergy
An immediate immune response triggered by allergens, leading to histamine release.
Delayed Allergy
Delayed Allergy
A delayed immune response mediated by memory T cells, resulting in longer-lasting allergic reactions.
Vaccines
Vaccines
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Antigen
Antigen
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Study Notes
- Body vulnerable to infection
Autoimmune Disorders
- T Cells and antibodies attack body cells
Allergies
- Exaggerated immune response to harmless material
- Acute Allergies occur within seconds
- Antibodies trigger release of histamine
- Histamine causes swelling, watery eyes, runny nose, etc.
- Delayed Allergy is slower to start, but lasts much longer
- Triggered by memory T Cells
Vaccines
- Introduce antigens in a safe way to build immunity
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