Question

nicotine floods the brains reward circuits with ____ which cause pleasant feelings. melatonin testosterone dopamine cortisol when the effects of the nicotine wear off, the user may feel ____. happy satisfied friendly irritated

Explanation:

• First question: Dopamine is a neurotransmitter associated with pleasure and reward in the brain. Melatonin is related to sleep - wake cycles, testosterone is a sex hormone, and cortisol is a stress hormone.
• Second question: When the effects of nicotine (which initially causes dopamine release and pleasant feelings) wear off, the user may experience withdrawal symptoms. Irritation is a common withdrawal symptom. Happy, satisfied, and friendly are not typical feelings when nicotine effects wear off as the body is craving more nicotine.

Answer:

• First question: C. Dopamine
• Second question: D. irritated