The drunken driving suspect was unable to hold his hand out to the side and bring his finger to a stop on his nose because one of the brain structures depressed first by alcohol is

a) corpus callosum
b) cerebellum
c) medulla
d) hypothalamus

B - cerebellum.

Explanation:

Alcohol decreaseas the energy consumption in the cerebellum, which is the brain structure that coordinates motor activity. Therefore, its expected for a drunk person to be unable of passing the drunken driving test involving movements that would be difficult for an individual with decreased motor activity due to alcohol.

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