What are the cardinal signs of inflammation?

• A. Redness, Heat, Death, and Tension
• B. Redness, Swelling, Pain, and Loss of Function
• C. Swelling, Heat, Nausea, and Pain
• D. Pain, Fever, Fluids, and Loss of Function

Answer: (B)

The cardinal signs of inflammation are widely recognized as redness, swelling, pain, and loss of function. These signs reflect the body's immediate response to injury or infection, orchestrated by the immune system.

Redness occurs due to vasodilation, where blood vessels widen to increase blood flow to the affected area, delivering immune cells and essential nutrients. Swelling, or edema, results from the accumulation of fluid and immune cells in the tissues, a consequence of increased permeability of blood vessels. Pain is mediated by various chemical signals that sensitize nerve endings, making the area around the injury more sensitive, which serves as a protective mechanism to prevent further damage. Loss of function can be attributed to swelling and pain, which often restrict movement in the affected area, allowing healing to take place.

In contrast, the other options include elements that are not classic signs of inflammation. For instance, death, tension, and nausea are not specifically associated with the inflammatory response in the same way as the four cardinal signs are. These attributes do not accurately represent the physiological changes that typically occur during inflammation, making the selected answer the most appropriate choice.