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Question:

Which of the following is a characteristic of the autonomic nervous system?

A It regulates involuntary activity in the heart, stomach, lungs, and intestines.
Explaination

The somatic nervous system controls voluntary actions, while the autonomic nervous system functions primarily below the level of consciousness, to control functions such as digestion, heart rate, respiratory rate, perspiration, salivation, swallowing, and breathing. The central nervous system consists of the spinal cord and brain.