The Synapse and Neurotransmitters
Ever wonder how neurons talk to each other? They communicate across tiny gaps called synapses using chemical messengers called neurotransmitters. These molecules are stored in small vesicles in the presynaptic neuron (the sender).
When a nerve impulse arrives, the neurotransmitters are released into the synapse where they can attach to receptors on the postsynaptic neuron (the receiver). Some neurotransmitters are excitatory - they start a new impulse in the receiving neuron. Others are inhibitory - they prevent impulses from starting.
Any unused neurotransmitters are either broken down by enzymes or reabsorbed back into the presynaptic neuron through a process called reuptake. This cleanup process is crucial for normal brain function.
🧠 Brain Fact: Your brain has billions of synapses, and each one works similarly to this process! Every thought, feeling, and movement depends on these tiny chemical conversations.
