How does the brain work?
The brain is composed of billions of nerve cells, called neurons. Brain activity is the interaction of neurons as they communicate with one another. Neurons do not actually touch one another; instead, they are separated by a small gap called a synapse. Activity within a neuron is electrical; however electrical activity cannot cross the synapse. When one neuron wants to signal another, it releases a number of neurotransmitter chemical molecules into the synapse. For each type of neurotransmitter, the receiving neuron has specific receptor sites on the surface. As neurotransmitter molecules bind to a receptor site, the process causes electrical activity in the receptor neuron. The receiving neuron then releases the neurotransmitter molecules so that the sending neuron can absorb them from the synapse in a process called re-uptake, stopping the communication.
NAD QUESTIONS AND ANSWERS
The presence of dopamine, a neurotransmitter, in the synapses of the reward center of the brain is directly related to every feeling of pleasure we experience, from eating good food to falling in love. Other neurotransmitters mediate other emotions and attitudes.