Alright. So in this video, we're going to be talking about how we can classify sensory receptors based on the type of stimulus that they detect or their modality. Using this classification method, we end up with 5 types of sensory receptors. First are mechanoreceptors, and these respond to mechanical force. For example, something like pressure or vibration would be mechanical forces. Then we have thermoreceptors, which I would bet, based on the name, you could guess that these are going to be responding to changes in temperature. It's important to note here that they respond to temperature changes, not just temperature itself. Next, we have photoreceptors. Those respond to light stimuli, and we have chemoreceptors which respond to chemicals. These could be chemicals in the air, for example, the molecules that we can smell. This could be something that we can taste. So food has molecules. We can taste those molecules. Right? This could also be coming from fluids in the body. For example, blood. Lastly, we have nociceptors, and nociceptors respond to damaging stimuli causing pain. These are sometimes called pain receptors. Nociceptors are a bit unique in that they can actually respond to different types of stimuli. Nociceptors can respond to temperature, they can respond to pressure, they can respond to chemicals. What is kind of special about them is that they're only going to respond to stimuli that are strong or excessive enough to cause damage or injury to our body. For example, if the heat is hot enough to burn us, if the cold is cold enough to damage our skin, if the chemical is irritating, if the pressure is excessive enough to cause harm, that is when those nociceptors will become active and send up signals to the brain and the brain will then perceive that stimuli as a painful one. Alright, so those are the 5 types of sensory receptors when we classify them by stimulus type, and I will see you guys in our next video. Bye-bye.