PATHOLOGY

Detailed explanation-1: -Haemostasis. Haemostasis occurs immediately following an injury. To prevent exsanguination, vasoconstriction occurs and platelets undergo activation, adhesion and aggregation at the site of injury.

Detailed explanation-2: -Immediately following an injury, vasoconstriction of blood vessels will occur to minimize blood loss. The amount of vasoconstriction is related to the amount of vascular injury, but it is usually brief.

Detailed explanation-3: -Vasoconstriction is the initial response whenever there is vessel injury. Vasospasm of the blood vessels occurs first in response to injury of the vasculature. This vasospasm, in turn, stimulates vasoconstriction.

Detailed explanation-4: -As soon as there is a wound on the body, the blood vessels in the wound area constrict to reduce the blood flow. This is known as vasoconstriction. At the same time, clotting factors are released at the wound site to coagulate with fibrin, resulting in a thrombus, which is more commonly known as a blood clot.

Detailed explanation-5: -In the first few seconds following injury, there is transient arteriolar vasoconstriction to control any blood loss followed by arteriolar vasodilation to enhance blood flow in nearby capillaries and tissues. This provides blood components for managing the primary injury and initiating repair.