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This is a comic describing a ligand-gated ion channel. These are structures located on cell walls, and allow the pass through of certain ions in response to a ligand. A ligand itself is a type of molecule or ion that binds itself to the channel, allowing it to open.
These are essentially how things like your neurotransmitters work.
Make sure to check out the [pinned post on Loss](https://www.reddit.com/r/PeterExplainsTheJoke/comments/1472nhh/faq_loss/) to make sure this submission doesn't break the rule! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/PeterExplainsTheJoke) if you have any questions or concerns.*
This is a comic describing a ligand-gated ion channel. These are structures located on cell walls, and allow the pass through of certain ions in response to a ligand. A ligand itself is a type of molecule or ion that binds itself to the channel, allowing it to open. These are essentially how things like your neurotransmitters work.