What structure is concerned with the processing and maturing of T lymphocytes?
Spleen
Thymus gland
Tonsils
Pancreas
The Correct Answer is B
A. Spleen:
The spleen filters blood and helps initiate immune responses, but it does not mature T cells.
B. Thymus gland:
The thymus is the primary site where immature T lymphocytes mature and become functional.
C. Tonsils:
Tonsils help detect pathogens entering through the mouth or nose but are not involved in T cell maturation.
D. Pancreas:
The pancreas is involved in digestion and blood glucose regulation, not immune cell development.
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Related Questions
Correct Answer is B
Explanation
A. Skin:
The skin is part of the first line of defense, acting as a physical barrier.
B. Phagocytosis:
Phagocytosis, carried out by white blood cells like macrophages and neutrophils, is a component of the second line of defense, which includes non-specific internal immune responses.
C. Coughing:
Coughing is part of the first line of defense-mechanical clearance.
D. Sneezing:
Like coughing, sneezing is a mechanical defense included in the first line.
Correct Answer is D
Explanation
A. Allergic reaction:
Allergic reactions are typically associated with overactive immune responses, not decreased T and B cell function.
B. Increase in antibodies:
Antibody production actually declines with age due to reduced B cell function.
C. Cancer:
Decreased immune surveillance can contribute to cancer risk, but the most direct consequence of T and B cell decline is susceptibility to infections.
D. Infections:
Reduced activity of T and B cells impairs the immune response, making older adults more prone to infections.
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