It is late at night and you are walking along a dark sidewalk.In the bushes next to the sidewalk you hear something moving.Your heart starts beating fast,your pupils dilate,and you become very anxious.The neurotransmitter creating this effect is
A) acetylcholine.
B) norepinephrine.
C) dopamine.
D) serotonin.
E) an endorphin.

Question

Quizplus · Accepted Answer

The neurotransmitter responsible for the described physiological response (increased heart rate, dilation of pupils, anxiety) is norepinephrine, which is released in response to stress or danger. Acetylcholine is associated with muscle control and memory, dopamine with pleasure and reward, serotonin with mood regulation, and endorphins with pain relief.

It Is Late at Night and You Are Walking Along