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28 Cards in this Set
- Front
- Back
What is the PS portion of the ANS? List components.
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Craniosacral portion
CN III CN VII CN IX CN X Sacral spinal segments: - S2 - S3 - S4 |
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What is the sympathetic portion of the ANS? List components
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Thoracolumbar portion
T1 - L2 |
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ANS GVE innervates what three categories?
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Smooth muscle
Cardiac muscle Glands |
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Sympathetic outflow synapses at what type of ganglions?
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Paravertebral ganglion
or Prevertebral ganglion |
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Parasympathetic outflow synapses at what type of ganglions?
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Intramural ganglion
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What NT's are used in sympathetics?
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Preganglion - ACh
Postganglion - NE |
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What NT's are used in parasympathetics?
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Preganglion - ACh
Postganglion - ACh |
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The effect of NT on a target cell is determined by what?
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The nature of the target cell receptors
and Particular signal transduction mechanism that is linked |
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List sympathetic receptor types and describe each.
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1. Alpha (EXCITATORY)
alpha 1 and alpha 2 subtypes 2. Beta (INHIBITORY) beta 1 and beta 2 subtypes 3. Neuropeptide Y - Vascular SM contraction - Inhibition of NE release - Potentiation of Epinephrine 4. ACh Muscarinic - M1 |
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PS stimulation of muscarinic ACh receptors does what?
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PS nerve effects
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Stimulation of Sympathetic alpha 1 receptors does what?
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Vasoconstriction in
Viscera and Skin |
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Stimulation of Sympathetics beta 1 receptors does what?
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Increase HR and contractability
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Stimulation of Sympathetics beta 2 receptors does whta?
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Dilation of bronchioles in lung
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List the PS receptor types and describe each.
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1. Nicotinic
Linked to skeletal muscle and cholinergic synapses in autonomic ganglia 2. Muscarinic - M1 (EXCITATORY) - M2 (INHIBITORY) |
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Describe the depolarizing physiological process associated with the nicotinic ACh receptors.
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EXCITATION
Binded ACh allows Na+ in K+ out from sodium/potassium channels |
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Describe the hyperpolarizing physiological process associated with the Muscarinic ACh receptors.
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INHIBITION
ACh binds G-protein coupled receptors influence K+ channels to open K+ out |
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Describe the depolarization physiological process associated with the Muscarinic ACh receptors.
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EXCITATION
ACh binds G-protein coupled receptors influence K+ channels to close K+ cannot get out |
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Hyperpolarization of the muscarinic ACh receptors does what?
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Slower heart rate
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Depolorization of the muscarinic ACh receptors does what?
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Cause SM contraction in GI
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Locate the preganglionic cell bodies of CN III.
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Midbrain
Edinger-Westphal nu. |
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Locate the postganglion cell bodies of CN III.
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Ciliary ganglion
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Locate the preganglionic fibers of CN III
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Within CN III
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Locate the preganglion cell body of CN VII.
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Pons
Superior Salivatory nu. |
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Locate the preganglionic fibers of CN VII.
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Greater petrosal nerve
(to pterygopalatine ganglion) Chorda Tympani (to submandibular ganglion) |
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Locate the postganglionic cell bodies of CN VII.
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Pterygopalatine ganglion
Submandibular ganglion |
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Locate the preganglionic cell bodies of CN IX.
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Medulla
Inferior Salivatory nu. |
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Locate the preganglionic fibers of CN IX.
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Tympanic branch of IX
Tympanic plexus Lesser Petrosal nerve |
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Locate the postganglionic cell bodies of CN IX.
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Otic ganglion
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