nervous and immune systems nervous and muscular systems circulatory and immune systems circulatory and muscular systems
I gave my students this multiple choice question: A reflex can protect the body from harm. Which organ systems work together to produce a reflex?

Only one answer is correct among these 4 choices:
- nervous and immune systems
- nervous and muscular systems
- circulatory and immune systems
- circulatory and muscular systems

Could you tell me which one is correct?

nervous and muscular systems