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ch. 16 revised
ANS
25
Anatomy
Undergraduate 1
07/11/2011

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Term
Divisions of the ANS.
Definition
Sympathetic and parasympathetic.
Term
Thoracolumbar division
Definition
Sympathetic division
Term
Craniosacral division
Definition
Parasympathetic division
Term
Place of origin for parasympathetic preganglionic fibers.
Definition
Brain and sacral region of the spinal cord.
Term
Preganglionic neurosomas place of origin in the parasympathetic region.
Definition
Midbrain, pons, medulla oblongata and segments S2 -> S4 of the spinal cord.
Term
Describe the preganglionic fibers of the sympathetic division.
Definition
Short.
Term
Describe the preganglionic and fibers of the parasympathetic division.
Definition
Long.
Term
Describe the postganglionic fibers of the sympathetic divison.
Definition
Long.
Term
Describe the postganglionic fibers of the parasympathetic division.
Definition
Short.
Term
Origin of preganglionic neurosomas of the sympathetic divison.
Definition
Gray matter of spinal cord.
Term
Origin of preganglionic fibers of the sympathetic division
Definition
T1 -> L2 spinal nerves.
Term
Function of the sympathetic divison of the ANS.
Definition
increases alertness, heart rate, blood pressure, pulmonary airflow, blood glucose concentration and blood flow to cardiac and skeletal muscle. Reduces blood flow to the skin and digestive tract.
Term
Function of the parasympathetic division of the ANS.
Definition
Reduces energy expenditure. Functions in digestion and waste elimination.
Term
What is the major difference in the splanchnic nerve route and the spinal and sympathetic nerve routes in the sympathetic division of the ANS.
Definition
The preganglionic fibers pass through the paravertebral ganglia without synapsing. The preganglionic fibers continue to a 2nd ganglion outside of the paravertebral ganglion to synapse, with the postganglionic fibers.
Term
What is the spinal nerve route of the sympathetic division of the ANS.
Definition
The preganglionic fibers synapse within the sympathetic chain ganglion at the level of entry.
Term
What is the sympathetic nerve route of the sympathetic division of the ANS.
Definition
The preganglionic fibers ascend or descend within the sympathetic chain and synapse with the paravertebral ganglion at a different level.
Term
What is the white communicating ramus?
Definition
The myelinated route that preganglionic fibers arise to the paravertebral ganglion.
Term
Which division of the ANS does the paravertebral ganglion belong with?
Definition
Sympathetic.
Term
Does the parasympathetic division of the ANS interact with white and gray communicating ramus?
Definition
No, only the sympathetic.
Term
Explain muscarinic
Definition
Receptor for ACh in the postganglion synapse of the parasympathetic division of the ANS.
Term
Explain cholinergic.
Definition
Releases or recepts ACh. Located in the preganglionic synapse of both the sympathetic and parasympathetic divisions and the postganglionic synapse of the parasympathetic division.
Term
Define adrenergic.
Definition
recepts norepinephrin. Only in the postganglionic synapse of the sympathetic division of the ANS. There is alpha and beta.
Term
Explain nicotinic.
Definition
Receptor in the preganglionic synapse of the sympathetic and parasympathetic divisions.
Term
What is the alpha-adrenergic feceptor.
Definition
Exictatory.
Term
What is the beta-adreneric receptor?
Definition
Inhibitory.
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