Chapter 16 Study guide Flashcards
Autonomic nervous system
visceral motor system
acts on glands, cardiac and smooth muscle
involuntary
visceral reflex arc
Sympathetic
parasympathetic
Sympathetic division
fight or flight
prepares body for action
stress activated
parasympathetic division
rest and digest
calming affect on body
stimulates digestion
autonomic reflex arc
sensory receptor
sensory neuron
interneuron
motor neuron
effector
autonomic reflex arc example
blood pressure drops
reflex arc stimulates heart to beat faster
Somatic nervous system
voluntary
controls skeletal muscle
sympathetic neural pathway
preganglionic neurons arise from thoracic and lumbar region of spinla cord
to sympathetic chain of ganglia adjacent to vertebral column
postgangliionic neurons travel to target organs
parasympathetic neural pathway
preganglionic neurons arise in the craniosacral regions of the spinal cord
long preganglionic fibers
terminal ganglia located in or near target organ
adrenal gland
located superior to kidney
secretes norepinephrine and epinephrine
essentially a sympathetic ganglion
ANS neuro transmitters
Norepinephrine NE
Acetylcholine ACh
ANS neuroreceptors
adrenic receptors (NE)
cholinergic receptors (ACh)
Sympathetic transmitters
NE to Adrenic receptors
excitatory
Inhibits digestion
parasympathetic neurotransmitters
ACh to Cholinergic receptors
inhibitive
excitatory to digestive system
Sympathetic
parasymathetic
relationship
Work together to balance body functions
as one raises levels the other will bring back down
