Ch 15 Flashcards
What is the Autonomic Nervous System?
A system of motor neurons
What does the ANS innervate?
Smooth muscle
Cardiac muscle
Glands
Which visceral internal organs does the ANS regulate?
Heart Rate
Blood Pressure
Digestion
Urination
What is the viseral motor division of the PNS>
The ANS
Which is faster, the somatic motor system or the ANS?
Somatic motor system
Denervation in the SMS causes what?
Flacidy or atrophy
Denervation in the ANS causes what?
Hypersensitivity
The sympathetic and parasympathetic divisions innervate the same or different structures?
Same
When is the sympathetic division activated?
Fight or flight
Extreme situations
When is the parasympathetic division activated?
Rest and digest
Conservation of energy
What is the spinal origins of the sympathetic and parasympathetic divisions?
Sym: Thoracolumbar T1-L2
Parasym: Craniospinal
Where are the sympathetic and parasympathetic ganglia located?
Sym: ganglia near spinal column
Parasym: ganglia near target organ
What is the relative length of the sym/parasym postganglionic fibers?
Sym: Long
Parasym: short
What is the relative branching of the sym/parasym fibers?
Sym: highly branched to release norepinephrine
Parasym: few branches
What are the two parasympathetic division outflows?
Craninal and sacral
Write out chart of sym/parasym differenced, including: Sym Parasym
Origin
Location of ganglia
Length of pre- and post-ganglionic fibers
Rami communicatess
Degree of branching
Functional role
Neurotransmitters
What is the lateral gray horn?
On spinal cord
Does the sym or parasym contain more ganglia?
Sym
Which organs receive only sym innervation?
Sweat glands
Arrector pili muscles
Peripheral blood vescles
Write out table of effects of Para and Sym on organs
What does the adrenal medulla do?
Largest organ in the sym system
Secretes norephinephrine and adrelaline
Stimulated by preganglionic sym fibers
What do visceral sensory neurons do?
Stretch, temperature, chem changes
Where are the visceral sensory neuron cell bodies located?
Dorsal root ganglion
Visceral pain is perceived to be what?
Somatic pain in origin, superficial areas of body Referred pain
Study Visceral Reflex Arc
Visceral sensory and autonomic neurons are involved in which two fundamental bodily arcs?
Defecation
Micturiation
What is referred pain?
Visceral pain felt at a somatic site other than where the cause is situated.
Which way does visceral pain get to the CNS?
Sympathetic neurons
Which axons are more branched sym or parasym?
Sympathetic
Sketch out the Sympathetic and Parasympathetic chart
Sketch out the sym & para anatomical differences
