Answer:
NEUROTRANSMITTER
Explanation:
Imbalances with neurotransmitter results in depression, anxiety and other mood disorders. Examples of neurotransmitters that affects mood are Serotonin, Dopamine, GABA and Norepinephrine.
The Acetylcholine and norepinephrine are known as the excitatory neurotransmitters and the dopamine, serotonin, and GABA are known inhibitory neurotransmitter.
A Neurotransmitter influences behaviour by affecting neurons in a specific portion of the brain.
A large molecule made up of smaller molecules is called a macromolecule. Macromolecules are also sometimes called polymers.
Stimuli is detected by receptor cells . These stimuli are converted to electrical nerve impulses carried by sensory neurone to relay neurone where it is processed by Central Nervous System . The response is carried by the motor neurone to the effector s which are muscles or glands which reacts to the situation