In the autonomic nervous system, neurotransmitter activation of its receptor terminates when the neurotransmitter is broken down by enzymes or when it diffuses away. Which other mechanism leads to termination of neurotransmitter activity?.

The peripheral nervous system's autonomic nervous system (ANS), originally known as the vegetative nervous system (VNS), provides smooth muscle and glands, which in turn affects how internal organs work. The autonomic nerve system is a mechanism that governs body processes including heart rate, digestion, respiration, pupillary response, urine, and sexual arousal mostly subconsciously. The fundamental mechanism in charge of the fight-or-flight response is this system. Through the brainstem, the spinal cord, and the organs, integrated reflexes control the autonomic nervous system. Control of breathing, cardiac regulation (the cardiac control center), vasomotor activity (the vasomotor center), and other reflex acts including coughing, sneezing, swallowing, and vomiting are all examples of autonomic activities.

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