In Pavlov's study, the unconditioned stimulus (UCS) was ; the neutral stimulus was ; and, finally, the conditioned stimulus (CS) was .

In Pavlov's study, the unconditioned stimulus (UCS) was __Meat_; the neutral stimulus was ___bell__; and, finally, the conditioned stimulus (CS) was __bell__.

Explanation:

Pavlov was a physiologist and was studying the digestive system but he came up with the most valuable studies of psychology. He put the tubes in dog mouth to collect saliva and calculate the amount of saliva produced by dog in response to different stimuli.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.