Chapter 8: The Nerves System Autonomic Nervous System (ANS)

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Parasympathetic

all neurons release the neurotransmitter acetylcholine

Autonomic nervous system

consists of motor neurons to visceral effectors which are smooth muscle, cardiac muscle, and glnads

Parasympathetic division

dominates in relaxed situations

Sympathetic division

dominates in stressful situations

Parasympathetic

few postganglionic neurons, to one effector

Sympathetic

many postganglionic neurons, which go to many effector

Parasympathetic

near or in the visceral effector

Sympathetic

neurotransmitters acetylcholine and norepinephrine are released

Hypothalamus

part of the brain that integrates the functioning of the ANS

Parasympathetic

preganglionic neuron in the brain and sacral spinal cord

Two divisions of the ANS

sympathetic and parasympathetic division

Sympathetic

thoracic and lumbar spinal cord

Sympathetic

two chains outside the spinal column


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