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.
Neurotransmitters can be classified by function: Excitatory neurotransmitters: These types of neurotransmitters have excitatory effects on the neuron; they increase the likelihood that the neuron will fire an action potential. Some of the major excitatory neurotransmitters include epinephrine and norepinephrine.