Jamal thinks that vaping nicotine helps him maintain his weight. What physiological mechanisms explain how nicotine exposure might reduce appetite and aid in modest weight management?

• A. Nicotine suppresses appetite by altering gut motility and digestive enzyme secretion, resulting in reduced calorie absorption.
• B. Nicotine reduces hunger through central nervous system effects, increases calorie burning by boosting metabolic rate, and limits fat storage.
• C. Nicotine aids weight control by increasing physical activity and improving endurance, leading to greater calorie expenditure.
• D. Nicotine promotes weight loss mainly through its diuretic effect, causing fluid loss and temporary weight reduction.

Answer: (B)