When an artery constricts, we call it vasoconstriction.

当动脉收缩时，我们称之为血管收缩。

If you were to put yourself into a cold environment, we would experience in our vasculature, something known as vasoconstriction.

如果你把自己放在一个寒冷的环境中，我们的血管系统就会出现一种叫做血管收缩的现象。

Blood shift is related to peripheral vasoconstriction.

血液转移与外周血管收缩有关。

In another heat-preserving response -- called vasoconstriction -- blood vessels temporarily narrow.

在另一种称为血管收缩的保温反应中， 血管会暂时变窄。

During vasoconstriction, the artery gets smaller and offers increased resistance.

在血管收缩过程中，动脉变小，阻力增加。

Likewise, mild hypocapnia might be beneficial treatment as a temporary measure when treating cerebral edema, but hyperventilation could cause cerebral vasoconstriction.

同样，轻度低碳酸血症作为治疗脑水肿的临时措施可能是有益的治疗，但过度通气会导致脑血管收缩。

Likewise, if you wanted to raise body temperature, vasoconstriction reduces blood flow, which means less heat gets lost through the surface of the skin.

同样，如果你想提高体温，血管收缩会减少血液流动，通过皮肤散失的热量会相应减少。

Changes in diameter can be temporary, like during vasoconstriction or vasodilation — when the diameter increases or decreases, allowing more or less blood through.

直径的变化可能是暂时的，比如在血管收缩或舒张期间——直径增加或减少，允许或多或少的血液通过。

When an artery is in a state of vasoconstriction, the lumen of the artery gets smaller and blood flow decreases.

当动脉处于血管收缩状态时，动脉管腔变小，血流减少。

And you know what else? While low blood pH does things like change the shape of your hemoglobin to deliver oxygen, high pH causes vasoconstriction.

你知道还会发生什么吗？虽然低血液 pH 值会改变血红蛋白的形状来输送氧气，但高 pH 值会导致血管收缩。