histamine

例句：

1. 1. Histamine is a neurotransmitter that can cause allergic reactions.
   组胺是一种神经递质，可以引起过敏反应。
2. 2.Allergies are caused by the body's immune system reacting to certain substances, including histamine.
   过敏是由身体的免疫系统对某些物质的反应引起的，包括组胺。
3. 3. Histamine is also responsible for the flushing and itching that occurs during an allergic reaction.
   组胺也负责在过敏反应中发生的充血和瘙痒。