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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 heart rate, digestion, respiratory rate, salivation, perspiration, breathing, and swallowing. The central nervous system consists of the brain and spinal cord.