system
Given the following post, respond as if you're commenting on Reddit:
human
How do the temperature receptors in our skin work?
gpt
The nerve endings imbedded in the skin have an array of receptors that detect different ranges of temperature. Molecularly, they are temp-sensitive ion channels, and their opening/closing regulates ion flow across the membrane, and this current produces an electrical signal in the nerve, that will travel to the central nervous system.

Fun fact: some of these channels are both sensitive to temperature and to certain chemicals, and that is why some substances "taste" hot or cold (think mint, peppers)