has extensive branching of preganglionic axons?
533901
Sympathetic has extensive branching of preganglionic fibers; parasympathetic has minimal branching of preganglionic fibers. Sympathetic ganglia are within a few centimeters of the CNS; parasympathetic ganglia are close to the visceral organs served.
229158
An axon, or nerve fiber, is a long slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body or soma. Axons are in effect the primary transmission lines of the nervous system, and as bundles they help make up nerves.
1073889
The sympathetic ganglia, or autonomic ganglia, are the ganglia of the sympathetic nervous system. Ganglia are 20,000 to 30,000 afferent and efferent nerve cell bodies that run along on either side of the spinal cord. ... The cell bodies create long sympathetic chains that are on either side of the spinal cord.
922531
Axons are covered by a membrane known as an axolemma; the cytoplasm of an axon is called axoplasm. Most axons branch, in some cases very profusely. The end branches of an axon are called telodendria.
1418606
['Neuropraxia - physiologic block of nerve conduction within an axon without any anatomical interruption.', 'Axonotmesis - anatomical interruption of the axon with no or only partial interruption of the connective tissue framework.']
1184740
they have a long fibre (axon ) so they can carry messages up and down the body over long distances. in a stimulated neuron, an electrical nerve impulse passes along the axon. the axon is insulated by a fatty (myelin) sheath - the fatty sheath increases the speed of the nerve impulses along the neuron.
1346706
D001369. Anatomical terminology. An axon (from Greek ἄξων áxōn, axis), or nerve fiber (or nerve fibre: see spelling differences), is a long, slender projection of a nerve cell, or neuron, in vertebrates, that typically conducts electrical impulses known as action potentials away from the nerve cell body.
1006517
The neurons in sympathetic ganglia are the primary motor neurons of the sympathetic division in that they directly innervate smooth muscles, cardiac muscle, and glands.
912209
In the nervous system, axons may be myelinated, or unmyelinated. This is the provision of an insulating layer, called a myelin sheath. The myelin membrane is unique in its relatively high lipid to protein ratio. In the peripheral nervous system axons are myelinated by glial cells known as Schwann cells.
284622
A nerve contains bundles of nerve fibers, either axons or dendrites, surrounded by connective tissue. Sensory nerves contain only afferent fibers, long dendrites of sensory neurons. Motor nerves have only efferent fibers, long axons of motor neurons.
1274509
The very end of a branch of a nerve's axon, a long slender nerve fiber that conducts electrical signals to a nerve synapse (the gap between nerve cells). The axonal terminals are specialized to release the neurotransmitters of the presynaptic cell. ... store various neurotransmitters that are released at the synapse.
446005
The autonomic nervous system has three branches: the sympathetic nervous system, the parasympathetic nervous system and the enteric nervous system. Some textbooks do not include the enteric nervous system as part of this system.
447357
The very end of a branch of a nerve's axon, a long slender nerve fiber that conducts electrical signals to a nerve synapse (the gap between nerve cells). The axonal terminals are specialized to release the neurotransmitters of the presynaptic cell.
1237476
We point out that unmyelinated axons have voltage-gated sodium channels along the entire length of the membrane. In contrast, myelinated axons have voltage-gated sodium channels only in the nodal spaces. Nodal spaces (nodes of Ranvier) are unmyelinated spaces ∼2 μm long.
654563
The cell bodies of parasympathetic preganglionic neurons reside either in the brain stem or in the sacral spinal cord. ... Thus, parasympathetic preganglionic nerves are quite long, standing in contrast to the short preganglionic fibers of the sympathetic nervous system.
1355169
Both sympathetic and parasympathetic preganglionic neurons are cholinergic, meaning they release acetylcholine (Ach) at the synapse in the ganglion. In the parasympathetic system, postganglionic neurons are also cholinergic. However in the sympathetic system, postganglionic are not all the same.
306164
Numerous dendrons and dendrites provide a large surface area for connecting with other neurones, and carry nerve impulses towards the cell body. A single long axon carries the nerve impulse away from the cell body.