The effects of vasoconstriction (or the constriction of a vessel) are best understood if the following relationship is remembered Resistance through a vessel is inversely proportional to the fourth power of the radius Simply put, a small decrease in the radius of a vessel can cause a marked decrease in flow or increase in pressure or both Press the "back" button to return to where you came from
The narrowing of a blood vessel to shrink a wound and reduce blood flow; occurs when a cold compress or ice is applied to the skin