NURS 6501: MIDTERM EXAM: Please contact Assignment Samurai for help with NURS 6501: Midterm Exam or any other assignment. Email: assignmentsamurai@gmail.com   What is the predominant type of T cell implicated in the pathogenesis of Crohn disease? Group of answer choices

• Helper T cells (Th2)
• Cytotoxic T cells (Tc)
• Regulatory T cells (Treg)
• Helper T cells (Th1)

  The correct answer is Helper T cells (Th1).   Explanation: In Crohn disease, the predominant immune response is driven by Th1 helper T cells. These T cells play a central role in the inflammation seen in Crohn disease by producing cytokines like interferon-gamma (IFN-γ), which promote inflammatory responses, including the activation of macrophages and the production of pro-inflammatory mediators. The other options are less relevant to Crohn disease:

• Helper T cells (Th2): Th2 responses are more commonly associated with conditions like asthma or allergic reactions, not Crohn disease.
• Cytotoxic T cells (Tc): These cells are involved in killing infected or abnormal cells, but they are not the primary drivers of the inflammatory response in Crohn disease.
• Regulatory T cells (Treg): Treg cells help control immune responses and maintain tolerance. In Crohn disease, there is often a dysfunction or inadequate number of Treg cells, contributing to inappropriate inflammation. However, the main pathogenic role is still attributed to Th1 cells.

Thus, Th1 helper T cells are the key players in the pathogenesis of Crohn disease.