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Elva Reinger
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What impulse conduction is the fastest in neurons?
Axons conduct the nerve impulses. Dendrites receive the impulses. Possible the impulses go through the dendrites faster, though the synaptic cleft may slow this pathway. Dendrites are much shorter than axons.
Which type of tissue is specialized for conduction of impulses?
Nervous System
What tissue type functions in impulse conduction?
Nervous tissue.
What is the part of a neuron which acts as a tiny antennae and conducts signals toward the axon of that cell?
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Which type of membrane channels are found at the axon?
Voltage-gated Na+ and voltage-gated K+ channels
What type of conduction takes place in an unmyelinated axons?
Continuous conduction.
What type of axon allows saltatory conduction?
A myelinated axon
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.
Which type of axon will velocity of action potential conduction be the fastest?
Myelinated axons with the largest diameter
When does saltatory conduction occur?
Saltatory Conduction is a means by which action potentials are transmitted along myelinated nerve fibers. The cytoplasm of an axon is electrically conduction and because myelin inhibits charge leakage through the membrane, depolarization at one node of Ranvier is sufficient to elevate the voltage at a neighboring node to the threshold for action potential initiation. Therefore in myelinated axons, instead of axon propagating as waves but they occur at successive nodes and 'hop' along the axon. This means of travel is much faster than they would otherwise (120 m/sec compared to 35m/sec in unmyelinated nerve fibers). Another advantage of this is that energy is saved as sodium potassium pumps are only required at specific points along the axon. Sean Sinclair
What type of heat transfer takes place best in a solid?
conduction
What impulse conduction is the fastest in neurons?
Axons conduct the nerve impulses. Dendrites receive the impulses. Possible the impulses go through the dendrites faster, though the synaptic cleft may slow this pathway. Dendrites are much shorter than axons.
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!
Multiple sclerosis impairs which type of impulse propagation?
Saltatory conduction uses myelinated sheaths around the axon to aide in the efficiency that an action potential passes down the nerve's axon by jumping between nodes of ranvier. The word saltatory is taken from the french word "saltare" meaning leap. Saltatory conduction saves time and improves energy efficiency in the nervous system. In some neurological disorders such as Multiple Sclerosis, demyelination of axons occur, resulting in a block of conduction of the action potential.
What type of nervous system conduction occurs in myelinated axons?
Saltatory Conduction
What type of energy transfer is the transfer of heat through matter by molecular activity?
Because of molecular vibration the heat transferred through a solid is called CONDUCTION
How energy is transfered?
Either through particle transfer like conduction, or through waves
