Ch17 Autonomic nervous system Flashcards
Compare somatic and Autonomic nervous system
Somatic nervous system - voluntary effectors skeletal muscle. Axons innervate skeletal muscle afferent pathways originate in skeletal muscle
Autonomic nervous system- sympathetic nervous system and parasympathetic nervous system involuntary effectors. Innervate visceral organs afferent and efferent neurons, afferent pathways originate in visceral receptors
Dual innervation
And effector is innervated by both parasympathetic and sympathetic nervous system’s
Preganglionic neuron’s
Sympathetic nervous system - short thoracic lumbar
Parasympathetic nervous system long craniosacral
Myelinated
Post ganglionic neurons
Sympathetic nervous system- long release nor epinephrine excites or inhibits onto effectors
Parasympathetic nervous system short releases acetylcholine onto effectors
Unmyelinated
What body structures are innervated by the autonomic nervous system
The effectors that respond to autonomic regulation cardiac muscle smooth muscles and glands
Describe the sympathetic nervous system
preganglionic neuron > ganglion >post ganglion > effector’s or collateral ganglion
A.k.a. thoracolumbar division most active during times of stress exertion or emergency
Simulates energy to the muscles sweat and lipids
Decreases blood to skin increases heart rate blood to muscles dilate pupils and respiratory tubes
Sympathetic nervous system has a lot of divergence many pathways of information transfer leaving the spinal cord pre-ganglionic neurons and synapses in on ganglia allows many organs to be activated by SNS at the same time quickly
Celiac ganglia
inferior mesenteric ganglia
superior mesenteric ganglia
Describe the parasympathetic nervous system
A.k.a. craniosacral division most active during resting conditions more localized and specific preganglionic far away from the spinal cord ganglion next to a factor or inside affect or post gangrene
functions people construction digestion reproduction reduced heart rate
Vagus nerve leaving the brainstem
Sympathetic Ching ganglia
Pre-ganglion neurons can travel up and down Chain to effectors
collateral ganglion take Info and give it to effectors and visceral organs: Celiac ganglion superior mesenteric ganglion inferior mesenteric ganglion sympathetic nervous system
Release of acetylcholine
Both Parasympathetic and sympathetic nervous system release acetylcholine onto post ganglionic from preganglionic
Sympathetic releases nor epinephrine onto a factors from postganglionic
Parasympathetic really says acetylcholine onto factors from postganglionic
