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What is the difference in transmission between myelinated and unmyelinated fibers?
Impulse transmission on an unmyelinated nerve fiber is much slower than the impulse transmission on a myelinated nerve fiber.
What substance slows the message passing from the brain to the rest of the body?
Unmyelinated nerve fibers are slower than myelinated nerve fibers. The fibers covered by myelin are much faster.
What is the name of a autoimmune disease characterized by patches of unmyelinated nerve fibers?
multiple sclerosis (MS)
Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?
Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.
Can a myelinated axon have a larger diameter than an unmyelinated axon?
Unmyelinated fibers typically have smaller diameters than myelinated fibers.
Unmyelinated fibers conduct impulses more rapidly than myelinated fibers?
Other way, dude. Nerve fibers are just like electric wires. Just think of a Myelinated fiber as a wire with rubber on the outside, and unmyelinated with ought it. Electricity runs more efficiently through a wire that has rubber on it, and so do myelenated fibers, but with an added bonus, they are faster than their unmyelenated counterparts hope it helped!
What does non myelinated fibers look like?
Myelinated fibers appear white in comparison to unmyelinated fibers.
What has short unmyelinated postganglionic fibers?
parasynpathetic system
Which cell process are not myelinated?
According to McGraw Hill (please see related link below): Many nerve fibers in the CNS and PNS are unmyelinated. In the PNS, however, even the unmyelinated fibers are enveloped in Schwann cells. In this case, one Schwann cell harbors from 1 -12 small nerve fibers in grooves in its surface. The Schwann cell's plasma membrane does not spiral repeatedly around the fiber as it does in a myelin sheath, but folds once around each fiber and somewhat overlaps itself along the edges. This wrapping is the neurilemma (also called a mesaxon in unmyelinated nerve fibers). Also, gray matter of the brain and dendrites are unmyelinated, while axons are myelinated.
The short branched nerve fibers on the nerve cell that are the receptive areas of the neuron are known as the?
the short branched nerve fibers on the nerve cell are called dendrites
Gray matter in the spinal cord is mostly?
unmyelinated axons.
Are nerve fibers in ascending tracts myelinated?
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.
