autonomic nervous system Flashcards
what does the somatic system do?
conscious awareness
what is the autonomic sensory
not consciously perceived
what does autonomic motor do?
controls/modulates activity
cardiac muscle
smooth muscle
glands
where does the somatic motor neurons go?
from spinal cord to skeletal muscle
one nerve cell in pathway
what are the two motor neurons that are in autonomic motor system
preganglionic neuron
postganglionic neuron
where is the preganglionic neuron located
CNS synapses
where is the postganglionic neuron located
autonomic ganglion
this ends on the effector organ
what are the two divisions of the ANS
sympathetic division
parasympathetic division
what is the main difference between Sympathetic and Parasympathetic division
the are opposites
sympathetic stimulates the heart rate and parasympathetic slows it down
what is sympathetic trunk ganglia
vertical rows on either side of the vertebral column
post synaptic fibres mainly go to organs above diaphragm
what is prevertebral ganglia
anterior to vertebral column
what does the prevertebral ganglia contain
celiac
superior mesenteric
inferior mesenteric
what does the parasympathetic neurons do
output at top-medulla nuclei
-cranial nerves II, VII, IX, X (vagus verve)
what nerve is at the bottom of the spinal cord
sacral nerves
name the two neurotransmitters
acetylcholine
norepinephrine
