Although B and T lymphocytes originate in the bone marrow, T cells mature in the
appendix
thymus
spleen
tonsils
The Correct Answer is B
A. Appendix: The appendix contains lymphoid tissue and participates in immune surveillance, but it does not serve as a site for T cell maturation. Its role is primarily secondary immune function rather than primary lymphocyte development.
B. Thymus: T lymphocytes migrate from the bone marrow to the thymus to mature and acquire immunocompetence. The thymus provides the specialized environment for T cell differentiation, selection, and education before they enter circulation.
C. Spleen: The spleen functions as a secondary lymphoid organ where T cells encounter antigens and mount immune responses, but it does not support initial T cell maturation.
D. Tonsils: Tonsils are secondary lymphoid structures that trap antigens and facilitate local immune responses. They do not serve as a site for T cell development or maturation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Swelling:Swelling, or edema, is a classic cardinal sign of inflammation. It occurs due to increased vascular permeability, which allows fluid, proteins, and immune cells to accumulate in the affected tissue, contributing to the inflammatory response.
B. All are signs of inflammation:All the listed options-swelling, heat, pain, and redness-are classic cardinal signs of inflammation. Therefore, it is not correct to say that any one of them is absent; collectively, they define the inflammatory process.
C. Heat:Heat at the site of inflammation results from increased blood flow (hyperemia) due to vasodilation. It is one of the four primary cardinal signs and reflects the body’s attempt to deliver immune cells and proteins to the affected area.
D. Pain:Pain arises from the release of chemical mediators like prostaglandins and bradykinin that stimulate nerve endings. It signals tissue injury and serves as an alert to prevent further damage.
E. Redness:Redness, or erythema, is caused by increased blood flow to the affected area as part of the vasodilation response. It is a hallmark feature of inflammation and helps identify the affected site visually.
Correct Answer is B
Explanation
A. All contain valves to prevent the backflow of blood:Valves are present in veins, not arteries. Arteries rely on high pressure generated by the heart to maintain forward blood flow, so valves are generally unnecessary.
B. All carry blood away from the heart:By definition, arteries transport blood away from the heart, regardless of whether the blood is oxygenated or deoxygenated. Pulmonary arteries, for example, carry deoxygenated blood to the lungs, while systemic arteries carry oxygenated blood to tissues.
C. All carry oxygenated blood to the heart:Arteries do not carry blood to the heart; veins do. Additionally, some arteries (like the pulmonary arteries) carry deoxygenated blood away from the heart, so oxygen content is not a defining feature.
D. Only large arteries are lined with endothelium:All arteries, regardless of size, have an endothelial lining (tunica intima). This layer is essential for maintaining a smooth blood flow and regulating vascular functions.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.