十万个为什么·科学阅读30篇（6）
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Why Do We Feel Thirsty After Eating Salty Food?
为什么吃完咸食后会觉得口渴？
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Salt pulls water out of body cells into blood vessels.盐会将细胞内的水分抽入血管。
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This makes blood slightly thicker and more concentrated.这会使血液略微变稠、浓度升高。
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Brain sensors notice the change and send thirst signals.大脑感应器察觉变化，发出口渴信号。
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Drinking water restores balance between salt and fluid levels.喝水可恢复盐分与体液的平衡。
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Too much salt over time may raise blood pressure slowly.长期摄入过多盐分可能缓慢升高血压。
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Our bodies evolved this system to protect vital organs.人体演化出这一机制以保护重要器官。
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Children and elders feel thirst less strongly than adults.儿童和老年人的口渴感不如成年人强烈。
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Water helps kidneys flush extra salt safely away.水帮助肾脏安全排出多余盐分。