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Sympathetic pre-ganglionic neurons
Short neurons located next to spinal cord.
Sympathetic post-ganglionic neurons
Long neurons that transmit signals to target organs.
Acetylcholine
Neurotransmitter released by pre-ganglionic neurons.
Nicotinic acetylcholine receptors
Receptors on post-ganglionic neurons for acetylcholine.
Noradrenaline
Neurotransmitter released by post-ganglionic neurons.
Adrenoceptors
Receptors that noradrenaline acts upon.
Salivary glands
Sympathetic neurons release acetylcholine here.
Muscarinic acetylcholine receptor
Receptor for acetylcholine in salivary glands.
Noradrenaline vs Adrenaline
Both are catecholamines and monoamine neurotransmitters
adrenaline has an extra methyl on the amine group
Paravertebral ganglia
Most sympathetic ganglia near the spinal cord.
Prevertebral ganglia
Ganglia located close to target tissues.
Adrenal Medulla
Produces adrenaline under sympathetic control.
Chromaffin cells
Cells in adrenal medulla that release adrenaline.
ratio of adrenaline to noradrenaline in circulation
4:1 ratio
Note 
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