Which process increases peripheral blood flow by widening vessels?

Which process increases peripheral blood flow by widening vessels?

• A. Vasoconstriction
• B. Vasodilation
• C. Hematology
• D. Myocardial Infarction

Answer: (B)

Vasodilation. This is the widening of blood vessels, which happens when the smooth muscle in the arterioles relaxes and the vessel diameter increases. As the diameter grows, vascular resistance falls, so more blood can flow to the peripheral tissues like skin and muscles. Local factors such as nitric oxide, heat, or metabolic byproducts promote this widening, supporting processes like heat loss and increased blood supply during activity. In contrast, vasoconstriction narrows vessels and reduces flow; hematology is the study of blood, and a myocardial infarction is heart tissue damage from blocked blood supply, not a mechanism to widen vessels.

Vasodilation. This is the widening of blood vessels, which happens when the smooth muscle in the arterioles relaxes and the vessel diameter increases. As the diameter grows, vascular resistance falls, so more blood can flow to the peripheral tissues like skin and muscles. Local factors such as nitric oxide, heat, or metabolic byproducts promote this widening, supporting processes like heat loss and increased blood supply during activity. In contrast, vasoconstriction narrows vessels and reduces flow; hematology is the study of blood, and a myocardial infarction is heart tissue damage from blocked blood supply, not a mechanism to widen vessels.