What are receptors?

Receptors are like special helpers that listen for messages and tell cells what to do.

Imagine you have a toy phone that only works when someone calls your number. When it rings, you know it's time to play with your favorite game. That’s kind of how receptors work, they “listen” for signals from other parts of the body or even outside it, like food or medicine. When they get a message, they let the cell know what to do next.

Think about a doorbell. When someone presses the button outside, the bell rings inside your house, and that tells you to go open the door. Receptors are similar: they receive signals (like pressing the doorbell) and then send a message into the cell, telling it what to do next.

Sometimes receptors work like a light switch, when you flip it on, the light turns on. When a signal comes in, the receptor flips the switch inside the cell, starting a new action, like growing taller or feeling happy after eating ice cream.