autonomic nervous system ans - uobabylon.edu.iq
TRANSCRIPT
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Autonomic nervous system ANS
It involuntarily regulate the every day
needs and requirement of the vital
body function without conscious of the
mind
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Nervous system
PNS C NS
*Afferent N *Brain
*Efferent N *spinal cord
ANS Somatic NS
paraSympathetic
C(3,7,9,10)
S2-4 and synapse
sympathetic
T & L region
Enteric(Brain of gut) GIT,pancreas ,gall blader
Exo-endocrine, Motility,
Microcirculation
both
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*parasympathetic = Cholinergic
R. = Nicotinic
Muscarinic
Preganglion fiber long ,post short
Neurotransmitter = acetyl cholin
*Sympathetic = Adrenergic
R. = α1,2 & β1,2,3
Preganglion short fiber ,post long
Neurotransmitter =adrenaline & noradrenaline
epinephrine & nor epinephrine
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ANS Somatic
Ach Ach Ach
Preganglionic
neuron
Post ganglionic
neuron
parasympathetic sympathetic sympathetic
Ach Norepinephrine Norepinephrine
Adrenal medulla
Nicotinic
receptor
Nicotinic
receptor
Nicotinic
receptor
Adrenergic R Adrenergic R Muscarinic R
No ganglia
Nicotinic R
neurotransmitter
Neuro
transmitter In to
blood Ach
Ach = acetylcholin
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Innervation:
*Dual
*Sympathetic
sweat, kidney , pilomotor, adrenal
*Somatic
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Effect of parasympathetic NS
- Exocrine glands: secreation
Salivary ( watery), sweat, lacrymal,
bronchial glands
- Eye : constriction of pupil (miosis)
contraction of ciliary M
(lens accommodation for near vision)
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-heart : bradycardia
-BV: IP3 ca EDRF(NO) BP
-lung : bronchospasm
-bladder :contraction of detruser M ,
relaxation of sphincters micturation
-GI : *motility and gland sec
*dilate sphincter
-Sex organ: Erection
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SNS -heart : rate & force
BV : constriction except SK M
GI : *motility( relax sm)
*constrict sphincter
*NO eff on gland
Uterus : *relaxation in non pregnant
Sex organ :Ejaculation
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- Eye : dilatation of pupil (mydriasis)
relaxation of ciliary M
(lens accommodation for far vision)
-Hair (pilomotor) : piloerection
-Salivary : thick and viscus
-bladder : *relaxation of detruser M
*contraction of sphincters
Lung :dilate bronchiols
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REST
FEAR ,FLIGHT & FRIGHT