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Which of the Following Was Widely Used as a Pain

question 105

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Which of the following was widely used as a pain reliever in the nineteenth century, until it was found to be highly addictive?


Definitions:

Reflex

An automatic, involuntary response to a specific stimulus.

Breathing

The physiological process of inhaling oxygen and exhaling carbon dioxide, essential for life and cellular respiration.

Neonatal Period

First 4 weeks of life, a time of transition from intrauterine dependency to independent existence.

First

Referring to the initial or primary in a sequence or series.

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