Question

identify three of the seven common neurotransmitters and the functions of each. then describe what each neurotransmitter controls or regulates in the body.

Explanation:

• For each neurotransmitter, we first recall its main functions based on neurobiology knowledge. Then, we relate those functions to the body processes it regulates. For example, acetylcholine's role at the neuromuscular junction leads to its control of muscle movement, and its role in the parasympathetic system leads to control of autonomic functions. Dopamine's role in the reward system and motor control dictates what it regulates in the body. Serotonin's impact on mood, sleep, and appetite determines its regulatory roles.

Answer:

1. Acetylcholine:

• Function: It is involved in muscle contraction (at the neuromuscular junction), learning, memory, and attention.
• Regulation/Control: In the body, it controls voluntary muscle movements (like moving limbs), and also plays a role in the parasympathetic nervous system functions such as slowing the heart rate, increasing intestinal activity, and promoting glandular secretions.

1. Dopamine:

• Function: Associated with motivation, reward, and pleasure. It also has a role in motor control (movement).
• Regulation/Control: It regulates mood, helps in the smoothness of movement (a deficiency can lead to tremors and movement disorders like Parkinson's), and is involved in the brain's reward system (encouraging behaviors that are beneficial for survival like eating, socializing).

1. Serotonin:

• Function: Involved in mood regulation, sleep, and appetite.
• Regulation/Control: It regulates mood (low levels are associated with depression and anxiety), helps in regulating the sleep - wake cycle (promotes sleep), and also controls appetite (can influence feelings of fullness and food intake).