Endocrine System

• Acetylcholine (ACh)- enables muscles action, learning, and memory
• Dopamine -Influences movement, learning, attention, and emotion.
• Serotonin -Affects mood, hunger, sleep, and arousal.
• Norepinephrine -Helps control alertness and arousal.
• GABA (gamma-aminobutyric acid)-A major inhibitory neurotransmitter.
• Glutamate -A major excitatory neurotransmitter.
• Endorphins -Neurotransmitter that influences the perception of pain or pleasure.
• Substance P -Involved in pain perception and immune response.
• Adrenaline (Epinephrine) -A hormone released by the adrenal glands during stress or danger, increasing heart rate, blood pressure, and energy for the fight-or-flight response.
• Leptin -A hormone produces by fat cells that regulates energy balance by inhibiting hunger, helping to maintain body weight.
• Ghrelin - A hormone produced in the stomach that stimulates appetite, signaling the brain when it's time to eat.
• Melatonin -A hormone secreted by the pineal gland that regulates sleep-wake cycles, promoting sleep when it's dark.
• Oxytocin -A hormone that plays a role in social bonding, childbirth, and reproduction; it promotes trust, empathy, and pair bonding.