Bradykinin is primarily involved in which aspect of inflammation?

• A. Promotion of apoptosis
• B. Vasodilation and pain sensation
• C. Activation of B lymphocytes
• D. Prevention of tissue swelling

Answer: (B)

Bradykinin is a key inflammatory mediator that plays a significant role in the inflammatory response. It is primarily involved in promoting vasodilation, which is the widening of blood vessels. This process allows for increased blood flow to the affected area, contributing to the redness and warmth often observed in inflammation. Additionally, bradykinin is known to enhance pain sensation by acting on sensory nerve endings, leading to the experience of pain, a crucial component of the inflammatory process. Therefore, its involvement in both vasodilation and pain sensation is central to the overall effects seen during inflammation.

The other options are less relevant to bradykinin's function within inflammation. While apoptosis is a form of programmed cell death that can occur in various contexts, bradykinin is not primarily known for promoting it. The activation of B lymphocytes relates more to the adaptive immune response rather than the immediate effects of inflammation where bradykinin is significant. Moreover, prevention of tissue swelling generally pertains to mechanisms such as lymphatic drainage and other anti-inflammatory responses, whereas bradykinin can actually contribute to tissue swelling through increased vascular permeability. Thus, the role of bradykinin in vasodilation and pain sensation is well established and serves as a fundamental