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What transmits a nerve impulse at the highest rate?
Large myelinated axons.
Difference between optic tract and optic nerve?
Bundles of neuron processes are called tracts in the cns and nerves in the pns
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"
Are nerve fibers in ascending tracts myelinated?
If I was paying attention in med school, I think... The pre-ganglionic fibers are myelinated and the post-ganglionic are unmyelinated. This is in reference to the sympathetic and parasympathetic systems.
What are nerve axon tracks made of?
The axons of nerve cells are surrounded by myelin sheeths - a protective covering that allows for saltatory conduction down the axons, increasing speed and decreasing loss of signal. Axons make up the tissue known as "white matter."
What transmits a nerve impulse at the highest rate?
Large myelinated axons.
What minimizes leakage of the electrical current traveling along the axon?
The nodes of Ranvier along myelinated axons in sensory nerve fibers minimize leakage of the nerve impulse electrical signal.
Gray matter in the spinal cord is mostly?
unmyelinated axons.
What is the difference in transmission between myelinated and unmyelinated fibers?
Impulse transmission on an unmyelinated nerve fiber is much slower than the impulse transmission on a myelinated nerve fiber.
White matter of the spinal cord?
it is the substance surrounding the gray matter. It is also composed of myelinated nerve fibers and makes up nerve pathways called tracts.
Difference between optic tract and optic nerve?
Bundles of neuron processes are called tracts in the cns and nerves in the pns
What bodily function reaches the breakneck speed of 200 miles an hour?
Nerve impulses carried in myelinated 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"
Are nerve fibers in ascending tracts myelinated?
If I was paying attention in med school, I think... The pre-ganglionic fibers are myelinated and the post-ganglionic are unmyelinated. This is in reference to the sympathetic and parasympathetic systems.
What provides for the transmission of nerve impulses way from the cell body?
'Axons'
Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?
Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.
What is white matter in the brain composed of?
largely or entirely composed of nerve fibers and contain few or no neuronal cell bodies or dendrites.
