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Autonomic Nervous System - Coggle Diagram
Autonomic Nervous System
Short term functions
Constant fluid composition
Gas exchange
Ingestion and digestion of nutrients
Excretion of wastes
Transport of gases and nutrients to needy tissues
Body temperature regulation
Reproductive mechanics
Defensive behaviours
Long term functions
Recovery of the body
Circadian rhythms
Sleep and wake cycles
Development and maintenance of organs
Protection
Inflammation
Immunity
Maintenance of visceral organ function
Structure
A CNS preganglionic neuron projects to
Postganglionic neuron
Target tissue
Sympathetic
Preganglionic neuron connections
Sympathetic chain
Prevertebral ganglia
Are motor neurons!
Intermediolateral column
Adrenal gland via splanchic nerve
Releases adrenaline and noradrenaline into blood instead of sending axonal projections :
T1-L3
Function
Blood vessel constriction
Tonic release of noradrenaline
Alpha receptors
Increase heart rate
Nordrenaline
Adrenergic beta1 receptor
G_as protein
Increase in cAMP
Influx of Na / Ca
Relax airways
Inhibit digestion
Stimulates
Glucose production
Adrenaline secretion
Inhibits salivation
Sweating
Pupillary dilation muscles
Pupil dilation
Preganglionic neuron
N2 acetylcholine receptor
Postganglionic neuron / adrenal medulla
Target tissue
Alpha and beta adrenergic receptors
Noradrenaline
Adrenaline in circulation
Acetylcholine
Parasympathetic
Pregangliuonic neurons
Brainstem
Midbrain
Lower sacral spinal cord
Function
Decrease heart rate
Acetylcholine
Muscarinic2 receptor
G_ai protein
Decrease in cAMP
Efflux of Potassium
Decrease influx of Na / Ca
Constrict airways
Stimulate digestion
Stimulate salivation
Pupillary constrictor muscles
Pupil constricts via sphincter muscles
Preganglionic neuron
Postganglionic neuron
Target tissue
Muscarinic acetylcholine receptor
Acetylcholine
N2 receptor
Acetylcholine
Innervation detects change in blood flow
Sends it to the brain for adjustment
Reflex circuitry within medulla
BP drops
Decrease in baroreceptor activity
Reflex circuitry craps pants
Increase in sympathetic activity
Decrease in parasympathetic activity
Effects
Increase in total periphery resistance
Increase in stroke volume
Increase in heart rate
Increase in cardiac output
Exercise
Body needs to make choices in distributing blood
Needs to maintain BP
Needs to maintain supply
Changes
Decreased bloodflow
Brain
Liver
Kidney
Skin sometimes
Bones
Increased bloodflow
Muscles
Neutral
Heart
Sensory feedback from muscles
Changes cardiac output
Central command
Hierarchy of regulation
Autonomic centres in brainstem
Preganglionic neurons in brainstem and spinal cord
Primary motor neurons in autonomic ganglia
End organs