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When an axon is described as myelinated, it means that it is surrounded by a layer of myelin, which is a fatty substance that acts as an insulator. This insulation speeds up the transmission of electrical signals along the axon, allowing for quicker and more efficient communication between neurons.
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Can a myelinated axon have a larger diameter than an unmyelinated axon?
Yes, a myelinated axon can have a larger diameter than an unmyelinated axon. Myelin sheath covers the axon, and the diameter of the axon itself can vary independently of myelination. The larger diameter of a myelinated axon allows for faster conduction of nerve impulses compared to unmyelinated axons.
Where do axon collaterals emerge on a myelinated nerve?
Axon collaterals emerge from the main axon at regular intervals called Nodes of Ranvier on a myelinated nerve. These points are where the myelin sheath is interrupted, allowing axon collaterals to branch off and communicate with other neurons or muscle fibers.
Conduction along a myelinated axon is called?
It is called saltatory conduction. This describes the "jumping" of an action potential from node to node on a myelinated axon.
Where is the axon not insulated with myelin?
The axon is not insulated with myelin at the nodes of Ranvier. These are small gaps along the axon where the myelin sheath is absent and allow for faster propagation of action potentials by saltatory conduction.
Along myelinated sections between nodes in a myelinated axon electrical signals are conducted by?
Saltatory conduction is the process by which electrical signals jump between the nodes of Ranvier along myelinated axons, allowing for rapid transmission of action potentials. This occurs because the myelin sheath insulates the axon, forcing the electrical signal to "leap" from node to node where the membrane is exposed.
Can a myelinated axon have a larger diameter than an unmyelinated axon?
Yes, a myelinated axon can have a larger diameter than an unmyelinated axon. Myelin sheath covers the axon, and the diameter of the axon itself can vary independently of myelination. The larger diameter of a myelinated axon allows for faster conduction of nerve impulses compared to unmyelinated axons.
The speed of nerve impulse transmission through the axon of a sensory neuron will be quickest in?
I'm guessing; "myelinated nerve fibres" contrary to the much slower "non-myelinated nerve fibres"
The neurolemma and the myelin of the myelinated axons are interrupted at regular intervals along the axon by?
The gap between each myelinated section of an axon is known the node of ranvier.
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.
White matter of brain composed?
myelinated axon of the neurons
Where do axon collaterals emerge on a myelinated nerve?
Axon collaterals emerge from the main axon at regular intervals called Nodes of Ranvier on a myelinated nerve. These points are where the myelin sheath is interrupted, allowing axon collaterals to branch off and communicate with other neurons or muscle fibers.
What give white matter its white color?
Myelin in the myelinated axon
Conduction along a myelinated axon is called?
It is called saltatory conduction. This describes the "jumping" of an action potential from node to node on a myelinated axon.
Are muscles and glands myelinated?
Muscles and glands are not myelinated. It is the axon of a neuron that is myelinated. The myelin forms a layer called myelin sheath that makes the nervous system function properly.
What colour is the white matter?
white... what makes it white? Myelin in the myelinated axon.
The velocity of the action potential is fastest in which of the following axons?
a small myelinated axon
What type of axon allows saltatory conduction?
Myelinated axons allow for saltatory conduction, which is a faster method of transmitting action potentials. The myelin sheath insulates the axon and allows the action potential to "jump" from one node of Ranvier to the next, speeding up the process. Unmyelinated axons do not support saltatory conduction.
