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structurally they are very similar with the only real difference being that the myelinated (M) nerve (neurone) has schwann cells on its axon surface, but functionally they are very different as the M transmitts nerve impulses alot faster than the non-myelinated(NM) as it has nodes ranvier that allow the impulse to jump from gap to gap between schwann cells and so sppeding the rate at which it can depolarise the membrane to allow transmittion of the impulse, i could go on alot more but i wont :) hope this helps
yours scincerly a uni student trying to look smart ;)
i got to OXFORD (brookes) ...
What else can I help you with?
Which impulses are faster myelinated or unmyelinated?
Myelinated nerves conduct impulses faster than unmyelinated nerves. The myelin sheath acts as an insulator that allows for faster transmission of nerve signals by increasing the speed at which the action potential travels down the axon.
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.
What is the relationship between nerve size and conduction velocity?
velocity proportional to square root of diameter
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 is the relationship between size of nerve and conduction velocity?
For unmyelinated nerves there is a relationship between axon diameter and conduction velocity. Larger diameter nerves conduct faster. For myelinated nerves the a larger diameter nerve will conduct faster between the nodes of ranvier where the action potential is propagated. Conduction is said to be saltatoryas it jumps from node to node.
What is the name for bundles of myelinated axons in the PNS?
The name for bundles of myelinated axons in the peripheral nervous system (PNS) is "nerves." Nerves serve the purpose of transmitting sensory information and motor impulses between different parts of the body and the central nervous system.
Why are nerves myelinated?
Nerves are myelinated to increase the speed of nerve impulse conduction. The myelin sheath acts as insulation, helping the nerve signal to travel faster along the axon. This allows for more efficient communication between different parts of the body.
When do fetal nerves become myelinated?
Fetal nerves start to become myelinated around the 14th week of gestation. Myelination is a process where a fatty substance called myelin is deposited around the nerves, helping to speed up the transmission of nerve impulses.
How does conduction differ on myelinated vs unmyelinated axons?
Very simples, myelinated axons have a myelin sheath! These are produced by the schwann cells in the Peripheral Nervous System and oligodendrocytes in the Central Nervous System. The myelin sheath is made out of lipids (fats) and proteins. The benefits of a myelinated axons is a faster transmission of an electrical impulse and also insulation. The breakdown of a myelin sheath from a medical background results in Demyelination.Tortora, G, Derrickson, B (2009) Principles of Anatomy and Physiology, Wiley, Asia, 12th Edition, Volume 1, Pages 416-423Hope this helps!
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.
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.
Area of cns that has no myelinated nerve fibers?
The grey matter of the brain. Myelin is the insulation (like rubber around a copper wire) to help transmit electrical pulses. The white matter of the brain, our spinal cord and peripheral nerves all transmit signals wit the help of myelin. The grey matter is where the thoughts or actions originate and mostly consist of cell bodies.
