Which of the following is not a normal finding within a stool sample?
Macrophages
Erythrocytes
Parasites
Blood
Bacteria
The Correct Answer is B
A. Macrophages: Macrophages are tissue-resident immune cells and are not normally present free in stool; their presence suggests mucosal inflammation or shedding.
B. Erythrocytes: Red blood cells (erythrocytes) in stool indicate gastrointestinal bleeding and are not a normal finding.
C. Parasites: Parasites in stool indicate infection/infestation and are not normal (they are abnormal/pathologic when present).
D. Blood: Blood in stool signifies GI bleeding and is not normal.
E. Bacteria: Bacteria are a normal and abundant component of feces (normal gut flora).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
True: X-rays use ionizing radiation and are ideal for imaging dense structures like bone.
Correct Answer is B
Explanation
A. NK cells: Natural killer cells are innate immune effectors that kill infected or transformed cells - they are not the primary mediators of humoral (antibody) immunity.
B. T cells: T cells mediate cell-mediated immunity (cytotoxic and helper roles); helper T cells support humoral responses but they are not the direct humoral mediators.
C. B cells: B lymphocytes differentiate into plasma cells that produce antibodies - humoral immunity is mediated by B cells/antibodies.
D. Macrophages: Macrophages are phagocytes and antigen-presenting cells of innate/adaptive immunity, not the main mediators of humoral antibody production.
E. Neutrophils: Neutrophils are innate phagocytic cells involved in acute inflammation, not humoral antibody production.
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