What is the name of a severe allergic reaction?
Anaphylaxis (hypersensitivity reaction)
Immunosuppression
Immunocompetence
Autoimmunity
The Correct Answer is A
A. Anaphylaxis (hypersensitivity reaction)
Anaphylaxis is a life-threatening allergic reaction involving airway constriction, drop in blood pressure, and widespread inflammation.
B. Immunosuppression
Immunosuppression is a reduced immune response, not a hypersensitivity reaction.
C. Immunocompetence
This is the normal functioning of the immune system, not a reaction.
D. Autoimmunity
Autoimmunity is when the body attacks its own tissues, not an allergic reaction.
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Related Questions
Correct Answer is D
Explanation
A. Infections:
Infections in older adults are often due to immune suppression, not directly from autoantibodies.
B. Cancer:
While aging does increase cancer risk, autoantibodies do not directly cause cancer.
C. Allergic reaction:
Allergies involve hypersensitivity reactions to external antigens, not the body's own cells.
D. Autoimmune disease:
Autoantibodies target the body's own tissues, leading to autoimmune diseases such as rheumatoid arthritis or lupus, which are more common in older adults.
Correct Answer is C
Explanation
A. Is secreted by all lymph nodes:
Thymosin is not produced by lymph nodes; it is secreted by the thymus gland.
B. Is the fluid within the lymph nodes:
Lymph fluid circulates within lymph nodes, not thymosin.
C. Is a hormone:
Thymosin is a hormone secreted by the thymus that plays a role in the development and differentiation of T lymphocytes.
D. Plays no known role:
Thymosin has an important role in immune system development.
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