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Some neurons are myelinated so they can carry signals faster.
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What is the name for bundles of myelinated axons in the PNS?
nerves
A myelinated nerve fiber is characterized as being whereas an unmyelinated?
Myelinated nerves are white, and composes the white matter of the brain and spinal cord they also are able to pass an action potential down an axon much faster; Unmyelinated nerves are gray, and composes the gray matter of the brain and spinal cord. These nerves transmit signals much slower
What nerve cells can you use to distinguish colors?
It depends on the tissue. Most nerves are too small to see individually, but there are bundles that can be viewed with the naked eye or a good dissecting microscope. Nerves can be myelinated, which means that they coated with a fatty layer to speed signal transmission. Most peripheral nerves and those not in the cortex of the brain are myelinated and thus appear white. Unmyelinated nerves are grayish, which is where the term "gray matter" comes from.
Along myelinated sections between nodes in a myelinated axon electrical signals are conducted by?
saltatorial conduction
Is white matter dense in myelinated axons?
Yes White matter is the part of the nervous system that is dense is myelinated axons
What is the name for bundles of myelinated axons in the PNS?
nerves
When do fetal nerves become myelinated?
five months intrauterine life
Are nerves more myelinated or unmyelinated in the CNS?
Nope. They can be found in the PNS as well. The myelinated ones in the CNS are made my Schwann cells. And the ones made in the PNS are made by oligodendrocytes.
A myelinated nerve fiber is characterized as being whereas an unmyelinated?
Myelinated nerves are white, and composes the white matter of the brain and spinal cord they also are able to pass an action potential down an axon much faster; Unmyelinated nerves are gray, and composes the gray matter of the brain and spinal cord. These nerves transmit signals much slower
Does a worm have a myelinated or non-myelinated neuron?
non-myelinated
What is the relationship between nerve size and conduction velocity?
velocity proportional to square root of diameter
What fibers are the most rapid nerve impulses conducted on?
These are nerves in animals. They include central and peripheral; peripheral include somatic and autonomic.
How fast does nerves send messages to the brain?
It varies from nerve to nerve (from 1 meter per second to 100 meters per second). The nerves to the voluntary muscles are myelinated, and thus are at the high speed end of speeds.
What contains myelinated axons?
Myelinated Fibers.
Are dendrites always myelinated?
No. They are almost never myelinated, but can be.
What nerve cells can you use to distinguish colors?
It depends on the tissue. Most nerves are too small to see individually, but there are bundles that can be viewed with the naked eye or a good dissecting microscope. Nerves can be myelinated, which means that they coated with a fatty layer to speed signal transmission. Most peripheral nerves and those not in the cortex of the brain are myelinated and thus appear white. Unmyelinated nerves are grayish, which is where the term "gray matter" comes from.
Difference between optic tract and optic nerve?
Bundles of neuron processes are called tracts in the cns and nerves in the pns
