Final answer:
The statement regarding vasodilation leading to excessive blood loss is false. Vasodilation increases blood flow, redness, and warmth but does not cause excessive blood loss at the site of injury; it allows for a higher blood supply and white cell access to facilitate healing.
Step-by-step explanation:
The statement that vasodilation occurs at the site of injury resulting in excessive blood loss at the site is false. While vasodilation does indeed occur, it is not responsible for excessive blood loss but for increased blood flow, redness, and warmth. During acute inflammation following cellular injury, a series of events is triggered, including vasodilation. Mediators such as histamine increase the diameters of local capillaries, causing the blood flow to increase, which is responsible for the heat and redness of inflamed tissue.
This process facilitates access for white blood cells to the site of inflammation, contributing to the cellular response. Moreover, the endothelium becomes more permeable, allowing fluids and cells to move to the site leading to swelling, or edema, and often pain.