Neurotransmitters are the 📮 postal services of our body, delivering messages between neurons and from neurons to muscles! These aren't regular postmen but chemical messengers, ensuring that messages get to where they need to be!

Imagine a train station, the train being the neurotransmitter. The train has to cross from one platform (the neuron) to another (either a neighboring neuron or a muscle).

• Starting Point: Neurotransmitters are released into the synaptic gap.
• Destination: They travel to the membrane of the next neuron (postsynaptic neuron) or muscle fiber.

Upon reaching the destination, neurotransmitters meet a magical door called transmembrane receptors. Think of them like the special entries at theme parks, where only VIPs (in this case, neurotransmitters) can get access!

• What's the magic?: These are proteins that stretch across cell membranes.
• The Action: When a neurotransmitter binds, these doors (channels) open up!
• The Result: Ions (like VIP guests) stream inside through facilitated diffusion, changing the mood inside—this is known as changing the membrane potential.