This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
IL - I produces - 
Select and explain. 
A. T lymphocyte activation, B. Delayed wound healing, C. Increased pain perception, D. Decreased PMN release from bone marrow
A: T lymphocyte activation
Answer: A: T lymphocyte activation 
Explanation: Interleukin -1 

Also known as leucocyte activating factor (LAF) or B cell activating factor (BAF).


Principally secreted by macrophages and monocytes, and epithelial cells.
Other sources are B lymphocytes, fibroblasts and endothelial cells.
Immunological effects-

- Activation of T cells for the production of IL - 2.
- B cell proliferation and antibody synthesis
- Neutrophil chemotaxis and increased PMN release from bone marrow.
- Increases body temperature (important endogenous pyrogen).
- Bone marrow cell proliferation
- Induction of acute phase protein.