ANS Flashcards
How many motor neurons from the CNS to effector in ANS? SNS?
ANS - 2: Preganglion, through ganglion, post ganglion then effected organ
SNS - 1: 1 motor neuron from CNS & synapses directly with skeletal muscle fiber
What type of control is the SNS? ANS?
Either voluntary or involuntary
ANS - involuntary
SNS - voluntary
ANS: what kind of tissue/organ is effected
Cardiac, smooth muscle, and glands
What are the two divisions of the ANS?
Sympathetic and parasympathetic
What kind of neurotransmitter does the SNS release? The ANS?
SNS: Acetylcholine
ANS: Acetylcholine & norepinephrine
T/F
Are visceral upload with nerves of both Sympathetic and parasympathetic divisions?
True
Which viscera receive only Sympathetic, not parasympathetic nerves?
Sweat glands, blood vessels, hair muscles
Where are the sympathetic preganglionic neurons located
T1-L2
Which nerve carries 80% of all parasympathetic nerve impulses?
Vagus nerve
Parasympathetic division: how do the craniosacral nerves differ in their ganglion
CN 3, 7, &9 route through a proximal ganglion before their longer assent to the effector organ
CN 10 and pelvic solan cynic nerves distro to organ and at the organ go through their ganglion
What is ACh destroyed by?
ACh-ase
Therefore short lived response
Which ANS neurons release ACh?
S & P all preganglionic axons
All P post ganglioside axons
Amon postganglionic axons (sweat glands)
Physiologically what are the sympathetic effects?
Increase heart rate and BP Dilate pupils Dilate airways Dilate vessels to skeletal, HE, LIV and adipose tissue Constrict blood to skin, GI, KI Mobilize E'y from glucose and fats
What are the effects of the parasympathetic system firing?
SLUDD Salivation Lacrimation Urination Digestion Dedication Decrease HR, pupil, airway
