Examples would be epinephrine or adrenaline and
norepinephrine. These are neurotransmitters of the sympathetic nervous system
which is responsible for fight/flight response during situations that either
threatens the host’s survival. Now, these neurotransmitters vasodilate the
blood vessels increasing the flow of blood to many vital organs. Physiologically,
increased heart rate, increased motor function and dilated pupils are some of
the biological reactions to stressful situations.
