Seratonin and dopamine
Retrograde neurotransmitters are released from dendrites and alter the activity of neighbouring cells. This process is the opposite of typical neurotransmitters, which are released from the axon terminal (of a post synaptic neuron) and act on dendrites. Two examples are the gaseous neurotransmitters Carbon Monoxide and Nitric Oxide.
Examples of neurotransmitters are: acetylcholine, dopamine, norepinephrine, and epinephrine. They also act as hormones but basically they are neurotransmitters that helps send nerve impulses to the brain through axons so that a certain action can be done by a muscle or gland.
Examples of neurotransmitters that are not catecholamines include serotonin, glutamate, and GABA (gamma-aminobutyric acid). These neurotransmitters play essential roles in various functions within the brain and nervous system, such as regulating mood, cognition, and motor control.
acetylcholine
Endorphins, norepinephrine, dopamine, and serotonin are examples of neurotransmitters, which are chemical messengers in the brain that help communicate signals between neurons. These neurotransmitters play various roles in regulating mood, emotions, pain, and pleasure in the brain and body.
Serotonin and Dopamine.
There are two kinds of neurotransmitters - INHIBITORY and EXCITATORY. Excitatory neurotransmitters are not necessarily exciting - they are what stimulate the brain. Those that calm the brain and help create balance are called inhibitory. Inhibitory neurotransmitters balance mood and are easily depleted when the excitatory neurotransmitters are overactive.
Direct acting neurotransmitters are neurotransmitters that directly bind to and activate ionotropic receptors on the postsynaptic neuron, causing a rapid change in membrane potential and leading to a quick response. Examples include acetylcholine and certain amino acids like glutamate and GABA.
Astrocytes and microglia are two types of glial cells that help remove neurotransmitters from receptor sites in the brain. They play a crucial role in maintaining the balance of neurotransmitters in the synapse by clearing excess neurotransmitters and preventing overstimulation of the neurons.
Not all molecules that act as neurotransmitters in the brain are considered "true" neurotransmitters. Some molecules, like gases (e.g., nitric oxide), lipids (e.g., endocannabinoids), and peptides (e.g., endorphins), can also act as neurotransmitters but are not classified as traditional neurotransmitters like dopamine or serotonin due to their unique chemical properties and modes of action. These non-traditional neurotransmitters play important roles in modulating neural signaling and can have significant effects on behavior and physiology.
neurotransmitters
neurotransmitters, which are chemical messengers that transmit signals between neurons. When a nerve impulse reaches the end of a neuron, it triggers the release of neurotransmitters into the synapse. These neurotransmitters then bind to receptors on the neighboring neuron, initiating a new nerve impulse to continue the signal transmission.