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A patient enters the emergency room with itchy, swollen hives. This is an example of a ___________ allergic response called __________.
What is the hallmark of a conjugated vaccine?
These vaccines contain weakly antigenic elements plus a more potent antigenic protein
What is the function of boosters?
Boosters are injections that are given periodically to maintain immunity.
What is the most efficient and cost-effective way to control infectious diseases?
active immunization by vaccination
Which of the following is NOT considered a hypersensitivity reaction?
immune system attack on the thyroid gland
Which of the following is an example of a type I hypersensitivity reaction?
watery eyes after exposure to animal dander
When a person has previously been vaccinated against a viral pathogen, which cells are activated if that same pathogen re-enters the host's cells months or years later?
Memory cytotoxic T cells
What is the primary benefit of vaccination?
An immune response will occur quicker upon future exposure to the pathogen.
Hypotheses explaining the development of autoimmune disease include
molecular mimicry, genetic factors, and hormonal stimulation of cytotoxic T cells.
If an Rh-positive woman marries an Rh-negative man, their children are at risk for hemolytic disease of the newborn.
What is the underlying problem in most acquired immunodeficiencies?
declining cell-mediated immunity
Opportunistic infections typical of AIDS but rare otherwise include
Pneumocystis pneumonia and Kaposi's sarcoma.
Which receptor on the helper T-cell recognizes the specific antigen from an antigen-presenting cell?
What direct effect do histamines and leukotrienes have on capillaries?
They allow capillary walls to open and become leaky.
Why is vasodilation important to tissue repair?
It allows for an increased delivery of oxygen, nutrients, and phagocytes to the site of damage.
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