You feel fine as you sit down in your usual seat in German class. However, when Dr. Kraus announces that there will be a pop quiz over 100 of the most difficult vocabulary words covered in the last few class sessions, your heart starts pounding, and you get a queasy feeling in your stomach. This reaction is most likely a(n)

Conditioned stimulus is the correct answer.

Explanation:

In conditioning, a formerly neutral stimulus that produces a conditioned response after being associated with an unconditioned stimulus. An example would be when dogs salivate after being used to listen to a beep and then receive food. In this case, the neutral stimulus is the exam while the response is getting a queasy feeling in the stomach.