A Happy Meal is a kid's meal that comes with a toy related to a current movie, TV show or other piece of pop culture. The most collectible Happy Meal toys are the ones from the Sonic the HedgeHog series, the Super Mario Brothers series, the He-Man series, the Marvel Comics series and the Shrek series. These toys can be highly valuable based on their condition and age.There have been many other collectible toys as well.
Additionally, neurotransmitters chemically link the brain and spinal cord with the rest of your body: muscles, organs, and glands. Thus, our brain is not only an array of wires (nerve cells/neurons) but also a highly evolved chemical soup (neurotransmitters). Neurotransmitters affect every cell, tissue, and system in your body.
Glutamatergic system. Glutamate is the main excitatory neurotransmitter in the CNS. It is distributed so widely that it is impossible to talk about individual centres or projections. It plays an indispensable role in synaptic plasticity, i.e. the removal of old, unused synapses, potentiation of others and the formation of new synapses.