Autonomic NS Flashcards
Where is the Origin in the central nervous system of the sympathetic division
In the thoracic and lumbar regions of the spinal cord
Where the postganglionic cell bodies for the sympathetic division
Sympathetic chain ganglia
Where is the origin in the central nervous system for the parasympathetic division
In the brainstem and sacral region of the spinal cord
Postganglionic cell bodies of the parasympathetic division
Close or on target organs
What happens in the sympathetic and parasympathetic ganglion
Acetylcholine is released and activates Nicotinic receptors which allows sodium to come in and excites the neuron
What do sympathetic post ganglionic neurons release and what is the receptor
They release norepinephrine onto adrenergic receptors
What does the parasympathetic pathway use as a neurotransmitter from the postganglionic neuron and what is the receptor
It releases acetylcholine onto muscarinic receptors
In the vesicles what is important in determining the effect on target
The concentration of neurotransmitters
What happens when action potentials arrive at the vesicles in the sympathetic pathway
A deep polarization opens voltage gated calcium channels in calcium entry triggers XO cytosis of synaptic vesicles containing norepinephrine that bind to adrenergic receptors. Receptor activation ceases when you’re up and Efron day fuses away from the synapse and is either removed and taken back up or metabolized
What happens in the parasympathetic division At the receptors
The same as for smell except acetylcholine is binding
You need to study the adrenal Medela for the final
That would probably be a good idea
