system
Given the following post, respond as if you're commenting on Reddit:
human
Do neurons or other cells generate biologically functional magnetic fields?

Just learning about electromagnetism, and I’m curious whether anything is known about magnetic fields generated during action potentials. 
Do charged molecules interact/move with magnetic fields for functional purposes in our body?

Further, do any human cells use magnetic interactions to communicate? Do any other animals use magnetism to communicate? Is there a magnetic-gated channel perhaps, similar to a voltage-gated channel?

Thanks!
gpt
Yes action potentials induce magnetic fields, as you'd expect with Maxwell's equations. No we don't communicate with them, they're pathetically weak. Some animals are receptive to Earth's magnetic field, but through a different mechanism. If there are receptors, we haven't found them.

The only reason it ever comes up really is transcranial magnetic stimulation, and magnetoencephalography. But they're not the most robust techniques.