True, driving a motor vehicle after taking substances which alter the central nervous system can have side effects which include impaired attention, reaction time, and vision.
The substance basically reacts to the nervous system just like anesthetic. The risks of taking any type of substance includes drowsiness, blurry vision, ignoring road signs, and lowering their reaction time.
Answer:
A. The atria are contracting and pushing blood into the bottom ventricles of the heart.
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