Which of the following statements about neurotransmitters is true?

The statement that neurotransmitters can cause problem behaviors when in excess or deficiency is accurate because neurotransmitters play a crucial role in signaling between neurons and influence various physiological and behavioral processes. An imbalance in neurotransmitter levels can lead to a range of behavioral issues. For instance, serotonin is associated with mood regulation, and low levels can lead to increased anxiety or aggression, while high levels may contribute to certain types of overly aggressive behaviors. Similarly, dopamine is linked to reward-seeking behavior, and imbalances can affect motivations and lead to unhealthy behaviors or addiction.

In summary, the relationship between neurotransmitters and behavior is well-documented in both human and animal studies, highlighting their significance in influencing a wide array of behaviors and emotional responses. This is essential for understanding how alterations in neurotransmitter levels can manifest as problem behaviors in animals.