Final Answer:
4) Depression decrease in norepinephrine levels would play a significant role in mental illness,
Step-by-step explanation:
4) Depression decrease in norepinephrine levels would play a significant role in mental illness,
A decrease in norepinephrine levels is associated with depression. Norepinephrine is a neurotransmitter that plays a role in mood regulation and arousal. In depression, there is often an imbalance of neurotransmitters, including a decrease in levels of norepinephrine.
Mania, on the other hand, is often associated with an increase in norepinephrine and other neurotransmitters. Schizophrenia is thought to involve complex interactions among neurotransmitters, including dopamine. Anxiety disorders may involve various neurotransmitters, including norepinephrine, serotonin, and gamma-aminobutyric acid (GABA). However, a specific decrease in norepinephrine levels is more commonly associated with depression.