10 Questions
What is the mechanism by which HIV enters T-helper cells?
By binding to the CD4+ receptor and inserting viral RNA into the host cell
Which of the following is a characteristic of Type I Immediate Hypersensitivity (Allergy)?
Occurs in organs exposed to the environment
What is the result of the decreased thymic hormone levels associated with aging?
Decrease in cell-mediated immunity
Which of the following represents an effect of stress on the immune system?
Decreased functioning of thymus through secretion of glucocorticoids from adrenal gland
What is the defining characteristic of Acquired Immune Deficiency Syndrome (AIDS) according to CDC guidelines?
CD4+ T-cell count
Which type of immunodeficiency is characterized by moderate to marked reduction in IgA, leading to infections in areas covered with mucosal secretions?
Selective IgE deficiency
What gene defect is associated with Thymic hypoplasia (DiGeorge Syndrome), causing primary T-cell deficiency due to developmental malformation of thymus gland?
Deletion on chromosome 22
Which type of immunodeficiency is characterized by hypogammaglobulinemia due to blocked maturation of B-cells, resulting in recurrent ear, sinus, and respiratory infections?
Common variable immunodeficiency
What type of immune abnormalities result in abnormal immunoglobulin synthesis or maturation deficiency of immunoglobulin?
B-lymphocyte immune abnormalities
Which type of immunodeficiency is characterized by an inability to clear infections, leading to recurrent ear, sinus, and respiratory infections?
Common variable immunodeficiency
Test your knowledge on the function of the immune system and the concept of immunodeficiency. This quiz covers topics such as recognizing self from non-self, primary immune deficiency, and humoral immunodeficiencies.
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