Neonatal Nurse Practitioner Practice Exam

Which cells are involved in the specific mechanisms of immune response?

1. natural killer cells

2. T with B lymphocytes

3. macrophages

4. neutrophils

The correct answer is: T with B lymphocytes

The involvement of T and B lymphocytes in the specific mechanisms of the immune response is paramount. These lymphocytes are central components of the adaptive immune system, which tailors its response to specific pathogens. T lymphocytes, or T cells, play a crucial role in cell-mediated immunity. There are different subsets of T cells, including cytotoxic T cells, which directly kill infected or cancerous cells, and helper T cells, which facilitate the overall immune response by releasing cytokines and aiding the activity of B cells and other immune cells. B lymphocytes, or B cells, are responsible for producing antibodies, which are proteins that specifically recognize and bind to antigens on pathogens. When B cells encounter their specific antigen, they can differentiate into plasma cells that secrete large quantities of antibodies, thus neutralizing the pathogen or marking it for destruction by other immune cells. This coordinated response between T and B cells ensures a targeted and effective response to specific antigens, which is the hallmark of the adaptive immune system. In contrast, the other cell types mentioned, such as natural killer cells, macrophages, and neutrophils, are primarily components of the innate immune response, which provides a more general defense against pathogens.