No. The myocardium.
If I was paying attention in med school, I think... The pre-ganglionic fibers are myelinated and the post-ganglionic are unmyelinated. This is in reference to the sympathetic and parasympathetic systems.
The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar regions of the spinal cord are part of the sympathetic nervous system. These fibers originate from the lateral horns of the spinal cord and are myelinated, allowing for rapid signal transmission. They typically travel through the ventral roots and enter the sympathetic chain or prevertebral ganglia to synapse with postganglionic neurons.
The bladder is innervated by the parasympathetic fibers of the pelvic splanchnic nerves (S2-S4) which stimulate contraction of the detrusor muscle. The internal urethral sphincter is innervated by sympathetic fibers from the hypogastric nerve, which cause it to contract and prevent urine leakage.
Sympathetic nerve paths are part of the sympathetic nervous system, which is responsible for the body's "fight or flight" response. These nerve pathways originate in the spinal cord and branch out to various organs and tissues in the body to help respond to stress or danger by increasing heart rate, dilating pupils, and redirecting blood flow.
Teased nerve fibers are nerve fibers that have been carefully dissected and separated for study under a microscope. This technique allows researchers to examine the individual components and structures of a nerve fiber in detail.
No, most blood vessels are innervated by both sympathetic and parasympathetic nerve fibers. However, sympathetic nerve fibers typically have a more pronounced effect on blood vessel activity compared to parasympathetic fibers.
vagus nerve and sympathetic fibers
the parasympathetic fibers of the cranial nerve number three.
Sweat glands are innervated by adrenergic sympathetic nerve fibers from the autonomic nervous system. These fibers release norepinephrine, which stimulates the sweat glands to produce sweat.
sympathetic
Sympathetic nervous system .
Preganglionic because they are myelinated. FALSE
The anesthetic agents that are infused through the small catheter block spinal nerve roots in the epidural space and the sympathetic nerve fibers adjacent to them.
Sympathetic fibers that originate from the spinal cord levels T5-L2 form the splanchnic nerves. These fibers pass through the sympathetic chain ganglia without synapsing and project to the abdominal and pelvic viscera to regulate their functions.
If I was paying attention in med school, I think... The pre-ganglionic fibers are myelinated and the post-ganglionic are unmyelinated. This is in reference to the sympathetic and parasympathetic systems.
Sympathetic nerve fibers are the most important in regulating blood flow, as they can cause vasoconstriction or vasodilation in blood vessels. These fibers release norepinephrine which can act on smooth muscle cells in the blood vessel walls to control blood flow throughout the body.
Yes and No. White communicating rami contain mylinated preganglionic sympathetic nerve fibers, but are only present at the levels of spinal cord segments T1-L2 (where the cell bodies for these nerve fibers exist in the lateral horn of the spinal cord). Although the sympathetic fibers only arise in the T1-L2 spinal cord segments, they are dispersed to all spinal nerves by traveling through the sympathetic chain. The preganglionic sympathetic fibers will enter the sympathetic chain thru whit rami communicans and then do one of 4 things: 1. synapse with a postganglionic cell body in the sympathetic chain at the level it enters 2. ascend within the chain to synapse 3. descend within the chain to synapse 4. splanchnic nerves leave the chain without synapsing and synapse closer to the organ they innervate.There are, however, GRAY rami communicans for all spinal nerves.I hope that helps