Autonomic nervous system Flashcards
what is the somatic nervous system
conscious control of skeletal muscle
what is parasympathetic/sympathetic division based on
CNS - location of cell body of preganglionic cells
what features do the axons of the somatic nervous system have
they are myelinated and extend from the CNS to the effector (skeletal muscle)
what features do the axons of the autonomic nervous system have
a two-neuron chain
what is the two neuron chain made of in the autonomic nervous system
1st is preganglionic nerve and 2nd is post ganglionic nerve
what are ganglia
cell bodies of many peripheral autonomuc neurones occur un clusters and form swellings on nerve trunks
what are preganglionic autonomic fibres
axons that form synapses with ganglion cells
what are post ganglionic fibres
axons innervating effector cells
what are varicosities
packets of NT known as vesicles
what releases NT in post ganglionic neurones
varicosities
what NT does a preganglionic nerve release and what is the transmission called
Acetylcholine, cholinergic transmission
what NTs does a post ganglionic nerve release and what are the transmission called (2)
- Acetylcholine, cholinergic transmission
- noradrenaline, noradrenergic transmission
what is NANC
non-adrenergic non-cholingeric neurotransmission
what are co-transmitters
not main transmitters, can be transmitters in own right or can support/ modulate NT
2 types of co transmitters
NT, neuromodulators
