autonomic nervous system 1 Flashcards
sensitivity
detecting a change in the environment and responding
anatomically
all those neural pathways that leave the brain that do not innervate the voluntary muscles
all responses are affected by the
peripheral nervous system
what are the roles of the autonomic nervous system
5 points
pupillary dilation accommodation for near vision blood vessel dilation/contraction force and rate of heart beat secretion of glands
what does the autonomic system regulate
blood pressure
body temp
internal PH
3 divisions of the autonomic nervous system
sympathetic
parasympathetic
enteric nervous system
ganglion what is it
a group of nerve cell bodies that lie outside the central nervous system
fight or flight where are the ganglions located
lengths
other facts
pre located in midbrain, medulla or lateral horn of spinal cord
ganglion forms the synaptic chain
short pre
long post
provides diffusion innervation of target tissues
rest and digest where are the ganglions located
lengths
other facts
pre located in medulla, or sacral segment of spinal cord
ganglion located in target tissues
long pre
short post
provides discrete innervation of target tissues
the adrenal medulla has no
no post ganglionic neuron
releases hormones adrenaline
how does excitation of all autonomic ganglia, sympathetic and para involve
it involves the Nt acetyl choline acting on nicotinic acetylcholine receptors
transmission of the post sympathetic usually uses what and acts on what
noradrenaline
on either alpha or beta adrenoreceptors
transmission of the post para synapse usually involves
ach acting on muscurinic receptors
