Let's think of cell signalling like a concert's sound system! 🎵

• Positive Feedback: Imagine you're singing and as you sing louder, the speakers amplify your voice even more. This is similar to positive feedback - the final result makes everything even stronger! 🎤📈

  Example: Calcium in our muscles. When a little bit of calcium is released from the endoplasmic reticulum (like the backstage storage of a concert), it makes even more calcium come out. This is like a rockstar (inositol trisphosphate or IP3) encouraging the crowd (calcium) to cheer louder!

• Negative Feedback: Think of this as a singer who stops singing when the crowd gets too loud. The end result (loud crowd) stops the action (singing) from continuing. 🎤📉

  Example: Testosterone's production. The more testosterone produced, the less the signals are to produce more. It's like a rockstar telling the crowd to calm down when they get too rowdy.

Bacteria in our mouths are like tiny tenants. Here's their real estate story

• Home Sweet Home: Bacteria love living on our teeth and gums, but they're always in danger of a "big wave" (us swallowing). So, they grab onto sticky proteins in our saliva, like gripping a safety rope during a storm.

• Communication is Key 📣: Bacteria chat with each other using something called quorum sensing. When there's a big enough crowd, they make a slimy protective home, kind of like building a sandcastle on a beach!

• Dental Plaque: This is like a bacterial condominium! 🏙 It's a protective layer, making it hard for our body's defenders to attack them. But, this isn't good news for us. Bacteria produce acids that damage our teeth. It's like if the tenants in a building threw trash out of the windows, harming the foundation.