What is the primary function of lymph nodes?
Filtering lymph and housing lymphocytes
Producing red blood cells
Facilitating nutrient absorption
Transporting oxygen
The Correct Answer is A
A. Filtering lymph and housing lymphocytes: Lymph nodes filter lymph fluid to remove pathogens and debris and contain lymphocytes (B and T cells) and antigen-presenting cells that participate in immune responses.
B. Producing red blood cells: Red blood cell production occurs primarily in the bone marrow, not in lymph nodes.
C. Facilitating nutrient absorption: Nutrient absorption (notably fat absorption) occurs in the small intestine, particularly the villi and lacteals, rather than in lymph nodes.
D. Transporting oxygen: Oxygen transport is performed by red blood cells in the bloodstream, not by lymph nodes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. B cells:B cells, upon activation, differentiate into plasma cells that synthesize and secrete antibodies that target specific antigens.
B. Macrophages:Macrophages perform phagocytosis and antigen presentation to T cells but do not produce antibodies.
C. T helper cells:T helper cells coordinate the immune response by stimulating B cells and cytotoxic T cells but are not antibody-producing cells themselves.
D. Neutrophils:Neutrophils are first responders in inflammation and bacterial infection but play no role in antibody production.
Correct Answer is C
Explanation
A. Leukocytes:Leukocytes (white blood cells) are involved in immune defense, not oxygen transport.
B. Platelets:Platelets mediate clotting and do not transport oxygen.
C. Hemoglobin:Hemoglobin, the oxygen-carrying protein within red blood cells, binds oxygen in the lungs and transports it to tissues.
D. Plasma:Plasma is the liquid portion of blood that carries nutrients and dissolved gases but oxygen is primarily carried bound to hemoglobin in red blood cells.
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