This tissue contains millions of chemoreceptors, nerves that capture odor molecules.

这种组织包含了数百万化学，也就是能捕获气味分子神经细胞。

They call on chemoreceptors in our taste buds and nasal passages to detect molecules in our food and the air around us.

它们利用我们味蕾和鼻腔通道中化学来检测我们食物和周围空气中分子。

Within minutes or even seconds of reaching altitudes of 1,500 meters, carotid chemoreceptors in your neck sense your blood's low oxygen pressure.

如果在几分钟甚至几秒钟内到达 1500 米以拔，脖子里颈动脉化学就会察觉到血液氧气压力过低。

These chemoreceptors are located in our brains and some large arteries that deliver blood to the brain.

这些化学位于我们大脑和一些向大脑输送血液大动脉中。

The central chemoreceptors are located in the medulla oblongata, and they're sensitive to changes in carbon dioxide levels.

中枢化学位于延髓，对二氧化碳含量变化敏。

Thermoreceptors respond to changes in temperature. photoreceptors react to light, chemoreceptors pay attention to chemicals, and mechanoreceptors respond to pressure, touch, and vibration.

热对温度变化做出反应。光对光做出反应，化学关注化学物质，机械对压力、触摸和振动做出反应。

The peripheral chemoreceptors are located in the aorta and carotid arteries, and they deliver blood to the brain.

外周化学位于主动脉和颈动脉，它们向大脑输送血液。

Therefore, we have what we call chemoreceptors, which serve to sense changes in carbon dioxide and oxygen levels in our body.

因此，我们有化学，用来知我们体内二氧化碳和氧气水平变化。

Just as the ear's mechanoreceptors or the tongue's chemoreceptors convert sounds and chemicals into action potentials, so too do your eyes' photoreceptors convert light energy into nerve impulses that the brain can understand.

就像耳朵机械或舌头化学将声音和化学物质转化为动作电位一样，眼睛光也将光能转化为大脑可以理解神经脉冲。

Central chemoreceptors located in the brain sense changes in carbon dioxide, while peripheral chemoreceptors located in the arteries delivering blood to the brain sense changes in both carbon dioxide and oxygen.

位于大脑中中央化学知二氧化碳变化，而位于动脉中周围化学知二氧化碳和氧气变化，这些动脉将血液输送至大脑。