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The connective tissue that covers unmyelinated and myelinated axons is called endoneurium.
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Are unmyelinated axons in the cerebral cortex?
The cerebral cortex contains the bodies of neurons which appear grey (grey matter). The layer under the cortex contains myelinated axons (white matter).
What contains myelinated axons?
Myelinated Fibers.
Which tissue is reinforced by white fibers only?
Myelinated axons in the central and peripheral nervous systems.
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.
Which neuron is never myelinated?
Neurons that do not have a myelin sheath must use continuous conduction, which is slower. These are the smaller axons of the CNS, as well as some types of fine sensory fibers, such as olfactory nerves.
What is a disadvantage of unmyelinated nervous tissue when compared to myelinated tissue?
Unmyelinated tissue is substantially slower in conducting impulses along the axon. With myelinated axons, the action potential (impulse) jumps from node to node greatly increasing the speed of the impulse.
Gray matter in the spinal cord is mostly?
unmyelinated axons.
Do unmyelinated fibers transmit slowly?
Yes, myelinated axons are much more effective.
What is meant when axon is described as myelinated?
Most axons are covered with a protective sheath of myelin, a substance made of fats and protein, which insulates the axon. Myelinated axons conduct neuronal signals faster than do unmyelinated axons.
What is the relationship between the degree of myelination and and conduction velocity?
That myelinated axons fare faster, unmyelinated are slower.
What is gray matter made out of?
Neuronal cell bodies, neuropil (dendrites and both unmyelinated axons and myelinated axons), glial cells (astroglia and oligodendrocytes) and capillaries.
Are unmyelinated axons in the cerebral cortex?
The cerebral cortex contains the bodies of neurons which appear grey (grey matter). The layer under the cortex contains myelinated axons (white matter).
Which best describes the components of a nerve?
axons, blood vessels, connective tissue, Schwann cell.
Which bestdescribes thecomponents ofa nerve?
axons, blood vessels, connective tissue, Schwann cell.
Does impulse travel faster along myelinated neuron?
Yes, impulses travel faster in myelinated axon rather than in unmyelinated. It is mostly due to nodes of Ranvier. Instead of travel along the axon, in myelinated axon impulses "jump" from node to node. Also there are two types of myelinated axons: type A and type B. (Type C in unmyelinated axon.) Type A is the fastest among all of them.
Why do humans possess a mixture of axons some large diameter heavily myelinated axons and some small diameter relatively unmyelinated axons?
The mixture of axon types contributes to variety of responses generated. Specifically, the rate with which a response is made can vary.
Which tissue is reinforced by white fibers only?
Myelinated axons in the central and peripheral nervous systems.
