Which type of immunodeficiency disorder is characterized by a lack of mature B cells and an inability to produce antibodies?
DiGeorge syndrome
X-linked agammaglobulinemia
Severe combined immunodeficiency (SCID)
Acquired immunodeficiency syndrome (AIDS)
The Correct Answer is B
Explanation: The correct answer is b. X-linked agammaglobulinemia. X-linked agammaglobulinemia is a primary immunodeficiency disorder caused by a genetic mutation that leads to the absence of mature B cells, resulting in an inability to produce antibodies (immunoglobulins). As a result, individuals with this disorder are highly susceptible to infections, especially bacterial infections.
Incorrect choices:
a. DiGeorge syndrome is a primary immunodeficiency disorder characterized by abnormalities in the development of certain organs, including the thymus, leading to impaired T cell function.
c. Severe combined immunodeficiency (SCID) is a group of rare genetic disorders that affect both T cells and B cells, resulting in a severe impairment of the immune system.
d. Acquired immunodeficiency syndrome (AIDS) is a secondary immunodeficiency disorder caused by the human immunodeficiency virus (HIV) infection, which specifically targets and destroys CD4+ T cells, weakening the immune system's ability to fight infections.
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Related Questions
Correct Answer is C
Explanation
Explanation: The correct answer is c. Frequent and severe infections. Immunodeficiency disorders impair the body's ability to fight infections, leading to recurrent and severe infections. This is a hallmark sign of immunodeficiency.
Incorrect choices:
a. Hyperactivity and restlessness are not typical clinical manifestations of immunodeficiency disorders. These symptoms are more commonly associated with conditions like attention deficit hyperactivity disorder (ADHD).
b. Increased appetite and weight gain are not specific to immunodeficiency disorders. They may be seen in conditions like hypothyroidism or certain eating disorders.
d. Hypertension and tachycardia are not characteristic clinical manifestations of immunodeficiency disorders. These symptoms may be associated with cardiovascular issues.
Correct Answer is C
Explanation
Explanation: The correct answer is c. Primary immunodeficiency disorders are typically present at birth or during early childhood and are caused by genetic defects that affect the function of the immune system. They are not acquired later in life due to environmental factors.
Incorrect choices:
a. Primary immunodeficiency disorders are not acquired later in life; they are usually genetic and present from birth.
b. Primary immunodeficiency disorders are characterized by a weakened or deficient immune response, not an overactive immune response.
d. Primary immunodeficiency disorders are often not easily treatable with antibiotics and antiviral medications because they result from genetic defects in the immune system.
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