Which lymphatic organ matures T-cells during early childhood?
Thymus
Spleen
Palatine tonsils
Adenoid
The Correct Answer is A
A. Thymus: The primary lymphoid organ where T-lymphocytes mature and are educated during early life.
B. Spleen: A secondary lymphoid organ that filters blood and supports immune responses but does not mature T-cells.
C. Palatine tonsils: Lymphoid tissue that participates in local immune defense of the oropharynx, not the main site for T-cell maturation.
D. Adenoid: Pharyngeal tonsil (lymphoid tissue) involved in mucosal immunity, not the central organ for T-cell maturation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Stomach: Begins protein digestion (pepsin) but does not complete digestion of carbs and most lipids.
B. Colon: Primarily involved in water absorption and fecal formation, not extensive enzymatic digestion of macronutrients.
C. Duodenum: Receives bile and pancreatic enzymes; major site where carbohydrates, lipids, and proteins are enzymatically broken down into absorbable units.
D. Jejunum: Major site of nutrient absorption after digestion, but the initial/completion of enzymatic digestion occurs in the duodenum.
Correct Answer is D
Explanation
A. Disaccharides: Broken down by brush-border enzymes (sucrase, lactase, maltase) in the small intestine, not in the stomach.
B. Lipids: Major digestion of dietary fats occurs in the small intestine via pancreatic lipase (with minor contribution from gastric lipase), so the stomach is not the main site.
C. Minerals: Inorganic nutrients that are absorbed, not enzymatically digested.
D. Proteins: Protein digestion begins in the stomach where pepsin (activated from pepsinogen in an acidic environment) breaks peptide bonds into smaller polypeptides.
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