Autonomic nervous system Flashcards
Where are visceral motor nuclei located?
Hypothalamus.
Structure of parasympathetic nerves in relation to ganglions?
Long pre ganglionic nerve, short post ganglionic nerve.
Structure of sympathetic nerves in relation to ganglions?
Short pre ganglionic nerve, long post ganglionic nerve.
Why do sympathetic nerve have a different structure in relation to ganglions compared to parasympathetic nerves?
Sympathetic response generally needs to be more coordinated. Nerves meet together before firing off.
What is the one exception to the two neurone arrangement in the autonomic nervous system?
Adrenal gland. One sympathetic nerve attached to adrenal gland.
In pre ganglionic nerves what neurotransmitter is released?
Acetylcholine.
In post ganglionic nerves what neurotransmitter is released in parasympathetic?
Acetylcholine
In post ganglionic nerves what neurotransmitter is released in sympathetic?
Noradrenaline.
What branch of nerves in the autonomic nervous system go to the lungs?
Parasympathetic only.
What receptor is found at parasympathetic and sympathetic ganglia?
Nicotinic acetylcholine receptor.
What receptor is found in the adrenal medulla?
Nicotinic acetylcholine receptor.
How does the sympathetic nerves liberate catecholamines from the adrenal medulla?
Acetylcholine released by the sympathetic nerves activates nicotinic acetylcholine receptors on adrenal medulla. Release of catecholamines into bloodstream.
What kind of receptor is nicotinic acetylcholine receptor?
Ion channel receptor
What binds to the nicotinic acetylcholine receptor?
Acetylcholine.
What receptor is found on organs that parasympathetic nerves and adrenergic nerves modulate?
Muscarinic receptor in parasympathetic and adrenergic receptor in sympathetic (G coupled protein receptors).
