So let's say you've with your same hand that you use for the carb, let's say in this case, it's hot. It's boiling. You'll have heat receptors on your hand, but they only go to a certain point. And beyond that threshold, now it's becomes painful. So we discern it as a temperature change. All that's 110 degrees is just painful and it's going to melt your hand. That first autumn neuron fires, action potentials goes right to the end. At the end of that neuron, at this point, we'll explain it a bit later, but it just releases a neurotransmitter,. which then communicates with the second order via a neurotrans