A client suffers from low mood and disturbed sleep. this client is most likely experiencing a change in which neurotransmitter?

The answer to this question is the change in neurotransmitter serotonin. A low level of serotonin can lead to a low mood, depression, and even anxiety. Serotonin is a chemical found in our body that gives / transmits impulses that is regulated to makes a person happy and maintains a mood balance.