0
What is the difference in transmission between myelinated and unmyelinated fibers?
Wiki User
∙ 12y ago
Impulse transmission on an unmyelinated nerve fiber is much slower than the impulse transmission on a myelinated nerve fiber.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is the relationship between the degree of myelination and and conduction velocity?
That myelinated axons fare faster, unmyelinated are slower.
What is the difference between myelinated and unmyelinated nerves?
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 is the difference between an internode and node of ranvier?
A Node of Ranvier is the space between two myelinated segments on an axon, while an internode is the space between two Nodes of Ranvier (alternativenly, the myelinated segment).
Why node of ranvier is present on myelinated axon?
Nodes of ranvier are locations of bare cell membrane between segments of myelinated cell membrane. Ion channels responsible for repropagation of action potentials are concentrated at these nodes. Unmyelinated axons have ion channels all over their cell membranes since they do not have myelin segments.
What is the relationship between nerve size and conduction velocity?
velocity proportional to square root of diameter
A neuron transmits information by the secretion of hormones.?
Neurons transmit information using the sodium/potassium channels. Basically the influx of these ions across the membrane causes the voltage to increase from its resting potential and this transmits a signal through neuron cells.These cells can be myelinated or unmyelinated. Myelinated cells just mean it has a protective sheath covering it. (Schwann cells). There are gaps between these cells which causes this electrical signal to "jump" from node to node. This makes the signal run through the body quicker.An interesting fact: The brain cells are unmyelinated. This means it needs more energy to transmit information and is actually why your brain is the organ that uses up the most ATP (or energy) in your body. Also, because it is unmyelinated, the brain appears grey - thus "grey matter". Myelinated cells are usually white-ish.
What kind of matter do you have in your spinal cord?
grey and white. White matter of the spinal cord is composed of myelinated and unmyelinated fibers that allow communication between different parts of the spinal cord and between the cord and brain. Gray matter in the spinal cord looks like the letter H or a butterfly.
Along myelinated sections between nodes in a myelinated axon electrical signals are conducted by?
saltatorial conduction
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.
Does A neuron transmit information by the secretion of hormones?
Neurons transmit information using the sodium/potassium channels. Basically the influx of these ions across the membrane causes the voltage to increase from its resting potential and this transmits a signal through neuron cells.These cells can be myelinated or unmyelinated. Myelinated cells just mean it has a protective sheath covering it. (Schwann cells). There are gaps between these cells which causes this electrical signal to "jump" from node to node. This makes the signal run through the body quicker.An interesting fact: The brain cells are unmyelinated. This means it needs more energy to transmit information and is actually why your brain is the organ that uses up the most ATP (or energy) in your body. Also, because it is unmyelinated, the brain appears grey - thus "grey matter". Myelinated cells are usually white-ish.
What is the difference between a continuous variable transmission and an automatic transmission?
A CVT transmission is a type of automatic transmission. It can provide any ratio between its minimum and maximum limits.
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!
