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Prior to Conditioning, a Dog Does Not Salivate to the Sound

question 106

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Prior to conditioning, a dog does not salivate to the sound of a ringing bell. At this point, the ringing bell is a(n) :


Definitions:

Specimen

A sample taken from a body, such as tissue, blood, or urine, used for analysis or diagnosis.

Abbreviation

A shortened form of a word or phrase used to represent the full term.

Microscope

A device designed for viewing items that are too tiny to be seen with the unaided eye.

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