Answer the following question given this paragraph: 

Adrenaline, or epinephrine, is a hormone and a neurotransmitter. It increases heart rate, constricts blood vessels, dilates air passages, and participates in the fight-or-flight response of the sympathetic nervous system. Adrenaline is produced in the adrenal medulla of the adrenal gland. So how does it effect processes all over the body?.


Q: What neurotransmitter is associated with the fight-or-flight response?

 Choices:

- stomach acid

- bile

- endorphins

- adrenaline

A:
adrenaline
