During their residence in the thymus, pre-T cells develop into cells that proliferate as rapidly as any
The Correct Answer is {"dropdown-group-1":"C"}
A. Cytotoxic T cells: Cytotoxic T cells are fully differentiated effector cells that destroy infected or malignant cells. They arise after maturation and selection processes in the thymus are complete. They do not represent the rapidly proliferating immature cells within the thymus.
B. Antigen-presenting cells: Antigen-presenting cells such as dendritic cells and macrophages process and present antigens to lymphocytes. They are not derived from pre-T cells and do not undergo thymic proliferation. Their function is immunologic signaling rather than rapid cellular expansion.
C. Thymocytes: Pre-T cells entering the thymus differentiate into thymocytes, which undergo intense proliferation during early T-cell development. These cells divide rapidly as they progress through selection stages that determine survival and lineage commitment. This high proliferative capacity supports generation of a diverse T-cell repertoire.
D. Memory T cells: Memory T cells are long-lived cells formed after antigen exposure in peripheral tissues. They are designed for longevity and rapid response upon re-exposure rather than rapid proliferation during development. They are not part of thymic maturation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Ovary: The ovary is responsible for producing and releasing the ovum (egg) during ovulation. Fertilization does not occur here; the ovary’s primary function is gamete production and hormone secretion, not serving as the site for sperm-egg union.
B. Fallopian tube: Fertilization most commonly occurs in the ampulla of the fallopian tube, where the ovum meets sperm shortly after ovulation. The environment of the fallopian tube provides optimal conditions for sperm capacitation, motility, and union with the ovum. This is the standard site for conception before the zygote moves to the uterus for implantation.
C. Uterus: The uterus is the site of implantation and fetal development, not fertilization. While the zygote eventually travels to the uterine cavity, conception occurs earlier in the reproductive tract.
D. Vagina: The vagina serves as the entry point for sperm during intercourse, but fertilization does not occur here. It is part of the birth canal and lower reproductive tract rather than the location for sperm-egg fusion.
Correct Answer is D
Explanation
A. Calcium: Calcium plays a major role in bone formation, neuromuscular function, and blood clotting. It is not involved in the synthesis of thyroid hormones.
B. Iron: Iron is required for hemoglobin formation and oxygen transport. Although iron deficiency can affect overall metabolism, it is not a structural component of thyroid hormones.
C. Copper: Copper is involved in iron metabolism, connective tissue formation, and nervous system function. It does not participate directly in thyroid hormone production.
D. Iodine: Iodine is an essential component of thyroxine (T4) and triiodothyronine (T3). Adequate iodine intake is necessary for normal thyroid hormone synthesis and regulation of metabolic processes.
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.