Which statement best characterizes the autonomic nervous system?

Which statement best characterizes the autonomic nervous system?

• A. Controls voluntary skeletal muscles.
• B. Signals are transmitted only to the brain.
• C. It is composed only of sensory neurons.
• D. It regulates glands and internal organs; sympathetic arouses, parasympathetic calms.

Answer: (D)

The autonomic nervous system governs actions of the body that you don’t consciously control, mainly regulating glands and internal organs to keep conditions stable. It adjusts things like heart rate, digestion, pupil size, and sweating. It has two division parties that work in balance: the sympathetic division arouses the body for action, increasing heart rate and alertness, while the parasympathetic division promotes rest and maintenance, slowing the heart and stimulating digestion. This dual, opposing control best captures how the autonomic system functions. Other statements miss important points: voluntary movements are managed by the somatic nervous system, not the autonomic. Signals aren’t sent only to the brain; autonomic pathways send instructions to glands and organs, and visceral sensory information travels back to the brain. It isn’t composed solely of sensory neurons; it includes motor neurons that drive autonomic actions as well as sensory components from internal organs.

The autonomic nervous system governs actions of the body that you don’t consciously control, mainly regulating glands and internal organs to keep conditions stable. It adjusts things like heart rate, digestion, pupil size, and sweating. It has two division parties that work in balance: the sympathetic division arouses the body for action, increasing heart rate and alertness, while the parasympathetic division promotes rest and maintenance, slowing the heart and stimulating digestion. This dual, opposing control best captures how the autonomic system functions.

Other statements miss important points: voluntary movements are managed by the somatic nervous system, not the autonomic. Signals aren’t sent only to the brain; autonomic pathways send instructions to glands and organs, and visceral sensory information travels back to the brain. It isn’t composed solely of sensory neurons; it includes motor neurons that drive autonomic actions as well as sensory components from internal organs.