Chapter 16 Study guide Flashcards Preview

Anatomy 205 > Chapter 16 Study guide > Flashcards

Flashcards in Chapter 16 Study guide Deck (20):
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Autonomic nervous system


visceral motor system

acts on glands, cardiac and smooth muscle

involuntary

visceral reflex arc

Sympathetic

parasympathetic

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Sympathetic division


fight or flight

prepares body for action

stress activated

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parasympathetic division


rest and digest

calming affect on body

stimulates digestion

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autonomic reflex arc


sensory receptor

sensory neuron

interneuron

motor neuron

effector

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autonomic reflex arc example


blood pressure drops

reflex arc stimulates heart to beat faster

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Somatic nervous system


voluntary

controls skeletal muscle

 

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sympathetic neural pathway


preganglionic neurons arise from thoracic and lumbar region of spinla cord

to sympathetic chain of ganglia adjacent to vertebral column

postgangliionic neurons travel to target organs

 

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parasympathetic neural pathway


preganglionic neurons arise in the craniosacral regions of the spinal cord

long preganglionic fibers

terminal ganglia located in or near target organ

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adrenal gland


located superior to kidney

secretes norepinephrine and epinephrine

essentially a sympathetic ganglion

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ANS neuro transmitters


Norepinephrine NE

Acetylcholine  ACh

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ANS neuroreceptors


adrenic receptors (NE)

cholinergic receptors (ACh)

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Sympathetic transmitters


NE to Adrenic receptors

excitatory

Inhibits digestion

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parasympathetic neurotransmitters


ACh to Cholinergic receptors

inhibitive

excitatory to digestive system

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Sympathetic

parasymathetic

relationship


Work together to balance body functions

as one raises levels the other will bring back down

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sympathetic examples


fear stimulates

raises heart rate

perspiration

dilate pupils

slows digestion

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parasympathetic examples

calming situation

lowers heart rate

activates digestion

slows breathing

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Cholinergic receptors


muscarinic

nicotinic

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adrenergic receptors


alpha

beta

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enteric nervous system


digestive tract

does not arise from CNS

innervates smooth muscle and glands

regulates: motility of esophagus, stomach and intestings

secretion of digestive enzymes and acid