Terms in this set (49)
What muscle does the somatic nervous system innervate
How many lower motor neurons does the somatic nervous system consist of
Where in the cell body is the somatic nervous systems LMN located
anterior gray horn
What does the efferent (ANS) innervate?
Smooth and cardiac muscles, glands
How many LMN does the ANS consist of?
Where does the first LMN in the ANS have its cell body?
Lateral gray horn of spinal cord
Where does the second LMN in the AND have its cell body?
What is the ANS controlled by
having excitatory (sympathetic) and inhibitory (parasympathetic) systems
What are the two efferent motor neurons in the ANS
preganglionic and postganglionic neurons
What are the two major divisions of the ANS
Sympathetic and Parasympathetic
Where are ganglia in the sympathetic located
Typically close to the spinal cord (short preganglionic neuron)
Where are ganglia located in the parasympathetic
Typically far away from the spinal cord (long preganglionic neuron)
location of cell body in 1st LMN of sympathetic
thoracic and lumbar spinal cord
Location of cell body in first LMN of parasympathetic
brain stem and sacral spinal cord
Neurotransmitters in sympathetic
acetylcholine and norepinephrine
Neurotransmitters in parasympathetic
Fight of flight, ALWAYS excitatory, eyes dialate, muscles get bigger, sweating beginds, GI and reproductive systems shut down.
Is the preganglion neuron long or short in sympathetic?
Is the postganglion neuron long or short in sympathetic?
What neurotransmitter does preganglionic release in sympathetic
What neurotransmitter does postganglion release in sympathetic
The first neuron that releases ach
Cholinergic receptor for ach
Second neuron that releases norepinephrine
Alpha or beta receptor
Ach is receptor, releases epinephrine into the blood stream
What effect does releasing epinephrine into the blood stream have?
Wine and dine or rest and digest *Just chilling out
What nerves are innervated in the parasympathetic
Oculomotor, facial, glossopharyngeal, and vagus
Oculomotor in parasympathetic
Facial in parasympathetic
Lacrimal glands, submandibular, sublingual salivary
Glossopharyngeal in parasympathetic
Parotid gland, salivary gland
Vagus in parasympathetic
Decrease hear rate, increase smooth muscle contraction of digestive organs and glands
Sacral division of parasympathetic
bladder and reproductive organs
Where is the only place parasympathetic fibers exit the spinal cord?
Through the sacral spinal nerves
Where is the ganglion located in the parasympathetic
Adjacent to the end organ (terminal organ)
Is the preganglionic long or short in parasympathetic
Is the postganglionic long or short in parasympathetic
The second neuron in the parasympathetic that releases acetylcholine is cholinergic. What is the receptor?
Drugs in the sympathetic
Adrenergic, epinephrine, albuteral, cocaine
Drugs in parasympathetic
Beta blockers (decrease heart rate and black the action of epinephrine and norepinephrine)
drug that increases activity of the sympathetic nervous system. Also called adrenergic, because they act like epinephrine (adrenaline)
Inhibits the sympathetic nervous system. Also called antiadrenergic because they block the effects of epinephrine
Drug that increases the activity of the parasympathetic nervous system. Also called cholinergic drugs
Drug that inhibits parasympathetic nervous system. Also called anticholinergic
Blocks effects of parasympathetic nervous system
Binds ach, excitatory, found on all postsynaptic cells in all ganglia of the ANS
Binds ach, found at neuromuscular junction and neuroglandular junction of the parasympathetic division. Some cells are excitatory while others are inhibited by ach.
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