vasoconstrikcióért
Vasoconstriction is the narrowing of blood vessels. This process occurs when the smooth muscle in the wall of a blood vessel contracts, reducing the diameter of the lumen. It is a physiological response that can be triggered by various factors, including the nervous system and hormones. Vasoconstriction plays a crucial role in regulating blood flow and blood pressure. When blood vessels constrict, the resistance to blood flow increases, which can lead to a rise in blood pressure. Conversely, vasodilation, the widening of blood vessels, has the opposite effect.
Several factors can induce vasoconstriction. Cold temperatures, for example, cause peripheral blood vessels to constrict to