The primary organ of the lymphatic system is the
thalamus.
thyroid.
thymus.
spleen.
The Correct Answer is C
A. thalamus: This is a structure in the brain that acts as a relay station for sensory information.
B. thyroid: This is an endocrine gland in the neck that regulates metabolism.
C. thymus: The thymus is considered a primary lymphoid organ because it is the site where T-lymphocytes (T cells) mature and become immunocompetent.
D. spleen: The spleen is a secondary lymphoid organ; it filters blood but is not where lymphocytes are "born" or matured.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Aerobic metabolism produces lactic acid: Aerobic metabolism (with oxygen) produces carbon dioxide, water, and ATP, not lactic acid.
B. Anaerobic metabolism produces lactic acid: When oxygen is scarce, cells switch to anaerobic pathways, which result in the byproduct of lactic acid.
C. Anaerobic metabolism produces carbonic acid: Carbonic acid is formed when CO2 (from aerobic metabolism) dissolves in water.
D. Both A and C are true: This is incorrect as both A and C describe the wrong metabolic pathways for those products.
Correct Answer is C
Explanation
A. medulla: The medulla oblongata controls autonomic functions like breathing and heart rate.
B. pons: The pons acts as a bridge for signals between different parts of the brain and helps regulate breathing.
C. cerebellum: The cerebellum is specifically responsible for coordinating muscle movement, posture, and maintaining balance.
D. hypothalamus: As noted previously, the hypothalamus focuses on homeostasis and hormone regulation, not physical balance.
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