A 2-year-old boy is evaluated for a severe combined immunodeficiency disease. His bone marrow has normal cellularity. Radioactive tracer studies demonstrate a normal number of T-cell precursors entering the thymus, but no mature T lymphocytes are found in the blood or peripheral organs. Cells populating the thymus are found to lack CD3. Which of the following capabilities would his cells lack? ( )
Ability to bind cell-bound peptides
B. Ability to express CD4/CD8 coreceptors
C. Ability to produce terminal deoxyribonucleotidyl transferase
D. Ability to proliferate in response to specific antigen
E. Ability to rearrange T-cell receptor gene segments
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A 4-year-old Caucasian boy is brought to his pediatrician with complaints of abnormal bruising and repeated bacterial infections. A blood workup reveals thrombocytopenia and neutropenia and the presence of numerous small, dense lymphoblasts with scant cytoplasm. Immunophenotyping of the abnormal cells determines them to be extremely primitive B cells, which are CD19+, HLA-DR+, and Tdt+. Which of the following best describes the status of immunoglobulin chain synthesis most likely in these cells?( )
A. IgM monomers inserted in the membrane
B. IgM monomers present in the cytoplasm
C. Mu (m) chains inserted in the membrane
D. Mu (m) chains present in the cytoplasm
E. No immunoglobulin chain synthesis present
管理者对下列哪些事项可以说不( )?
A. 不符合个人专业的事
B. 非自己力所能及的事
C. 自己感兴趣的事
D. 费时间的事
E. 有益于自己工作的事项
护理管理者的技能结构以沟通技能为主,能够制定具体工作方案的管理者为( )?
A. 高层管理者
B. 中层管理者
C. 基层管理者
D. 护理部主任
E. 护士长
本次疫情使更多人认识到院内感染控制的重要性,而医院常年院感管理体现了哪种护理管理理念( )?
A. 人本主义
B. 量变到质变
C. 发展观
D. 对立统一
E. 普遍联系观