T cells achieve immunocompetence in the
Liver
spleen
bloodstream
bone marrow
thymus
The Correct Answer is E
A. Liver: The liver is involved in metabolism, detoxification, and some immune functions like Kupffer cell activity, but it is not a site for T cell maturation or development of immunocompetence.
B. Spleen: The spleen is a secondary lymphoid organ where mature T cells encounter antigens, but it does not confer immunocompetence. It primarily filters blood and supports immune responses.
C. Bloodstream: T cells circulate in the bloodstream after becoming immunocompetent. The blood serves as a transport medium but is not a site for T cell maturation or education.
D. Bone marrow: While T cells originate from hematopoietic stem cells in the bone marrow, they do not achieve immunocompetence there. Bone marrow is the site for B cell maturation, not T cell education.
E. Thymus: The thymus is the primary lymphoid organ where T cells undergo differentiation, selection, and maturation. It provides the necessary environment for developing functional T cell receptors and self-tolerance, making it the site of T cell immunocompetence.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. In the center:The heart is not located in the exact midline of the body. Its position is slightly rotated, so the apex does not lie at the center.
B. To the right:The apex of the heart points away from the right side. Most of the right heart structures are positioned more medially and anteriorly.
C. To the left:The apex of the heart points downward, forward, and to the left, typically at the level of the 5th intercostal space in line with the midclavicular line. This leftward orientation is why the apex beat is most easily palpated on the left side of the chest.
Correct Answer is A
Explanation
Pus forms as part of the body’s inflammatory response to infection or tissue injury. Neutrophils arrive first and engulf pathogens, then die off, accumulating at the site. Macrophages follow and continue clearing debris. The mixture of dead neutrophils, macrophages, bacteria, and broken-down tissue creates the thick, often cloudy fluid known as pus.
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