What is the role of kinins in inflammation?

• A. Forming blood clots
• B. Promoting vasodilation
• C. Attracting immune cells
• D. Repairing damaged tissue

Answer: (B)

Kinins are a group of peptides that play a significant role in the inflammatory response, particularly through the process of vasodilation. When inflammation occurs, kinins are released, which lead to the widening of blood vessels. This vasodilation increases blood flow to the affected area, allowing for the delivery of immune cells and nutrients necessary for combating infection and initiating the healing process.

The increase in blood flow also contributes to the characteristic signs of inflammation, such as redness and warmth in the affected tissues. Additionally, kinins can enhance the permeability of blood vessels, allowing proteins and immune cells to move more easily into the damaged tissues, further supporting their function in inflammation. Overall, the promotion of vasodilation is a crucial mechanism by which kinins facilitate an effective inflammatory response.