Question at position 62 How do helper T cells activate the other cells of the adaptive immune system?By suppressing antigen-presenting cell activityBy transforming into natural killer cellsBy releasing leukotrienesBy releasing cytokinesBy directly attacking infected cells alongside other cytotoxic T cells

Question

BlackTom AI · Accepted Answer

Question restatement: How do helper T cells activate the other cells of the adaptive immune system?
Option 1: 'By suppressing antigen-presenting cell activity' — This is inaccurate. Helper T cells primarily coordinate the immune response, not broadly suppress antigen-presenting cells. Suppression of APC activity is not a primary or defining function of helper T cells.
Option 2: 'By transforming into natural killer cells' — Incorrect. Helper T cells do not transform into NK cells; they are a distinct subset of T lymphocytes (CD4+), with their role centered on signaling rather than cytotoxic transformation.
Option 3: 'By releasing leukotrienes' — Unrelated here. Leukotrienes are lipid mediators involved in inflammatory signaling, but they are not the main mechanism by which helper T cells activate other adaptive immune cells.
Option 4: 'By releasing cytokines' — This is the key mechanism. Helper T cells secrete a variety of cytokines (e.g., IL-2, IFN-γ, IL-4, IL-21) that promote activation and differentiation of B cells, cytotoxic T cells, and other immune cells, effectively coordinating the adaptive response.
Option 5: 'By directly attacking infected cells alongside other cytotoxic T cells' — Direct cytotoxic attack is the domain of cytotoxic T cells (CD8+), not helper T cells. Helper T cells assist rather than perform direct killing, so this description misattributes function.
Assessment: The correct option involves the central coordinating role of helper T cells via cytokine release, which signals and activates B cells, cytotoxic T cells, and other components of the adaptive response. The other choices mischaracterize the helper T cell function by implying suppression, transformation, lipid mediator roles, or direct cytotoxic action, none of which align with the helper T cell's primary mechanism of action.

查看解析

登录即可查看完整答案

类似问题

Why is it challenging and counterintuitive to create vaccines for insects such as honey bees?

Which of the following are components of the adaptive immune system: I. Macrophage II. B cells III. Dendritic cells IV. T cells V. Mast cell VI. Plasma cell VII. Squamous cell

Question at position 9 Which of the following is an example of the specific immune response?Mast cells release histamineComplement proteins trigger opsonizationMembrane attack complexPlasma cells release IgGRelease of interferon from a virus-infected cell

B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. Which of the following is not one of the reasons B-lymphocytes are considered part of the adaptive immunity?

Which of the following characteristics are most consistent with adaptive immunity?

Which of the following statements is incorrect?

Which is the specific immune response

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单