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Large diameter nerve fibers conduct impulses much faster than small diameter fibers?
Wiki User
∙ 12y ago
No, they do not. Large nerve fibers have a larger diameter than small nerve fibers as the name suggests, but they are also extremely well insulated with Myelin Sheath that makes them transmit electrical signals very fast. "A" fibers represent this type of large nerve fibers.
Small nerve fibers are smaller in diameter and there are two types, "B" & "C". B has less insulation than A, so it transmits less faster. C however, is not insulated at all and even though it has about the same diameter as B, it transmits electrical signals much more slowly.
Wiki User
∙ 12y ago
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What are the Fibers that carry impulses toward the neuron cell body are called?
Dendrites
Can a myelinated axon have a larger diameter than an unmyelinated axon?
Unmyelinated fibers typically have smaller diameters than myelinated fibers.
What is another name for atrioventricular bundle?
The Atrioventricular Bundle is also known as the Bundle of His. This conducts impulses and divides in ventrical to form fibers of Purkinge .
How fast do nerves impulses travel?
Nerve impulses travel through nerve fibers via a action potential and the speed at which the impulse travels depends on the type of nerve fibre. This can range from 100m/s in the case of touch to 20-30 m/s when you're thinking.
How can sympathetic and parasympathetic fibers act as antagonists?
Sympathetic fibers convey impulses that stimulate our "fight or flight" response. Parasympathetic are just the opposite, you might say they are for "rest and digest". They are both firing at the same time but depending on your environment and emotional state, one will dominate over the other.
What group of fibers spreads impulses at up to 2 meters per second?
The group of fibres that spread impulses throughout the body are called nerves or neurons. They are a specific type of cells which can undergo electrical stimulation to conduct impulses.
Explain the source of signals detected by the electromyogram electrodes?
muscle fibers produce and conduct their own impulses and their conducting of impulses result in voltage differences that can be detected by electrodes.
Unmyelinated fibers conduct impulses more rapidly than myelinated fibers?
Other way, dude. Nerve fibers are just like electric wires. Just think of a Myelinated fiber as a wire with rubber on the outside, and unmyelinated with ought it. Electricity runs more efficiently through a wire that has rubber on it, and so do myelenated fibers, but with an added bonus, they are faster than their unmyelenated counterparts hope it helped!
What carries cardiac impulses to the myocardium?
Purkinje Fibers
What is the name of the fibers that carry cardiac impulses from the interventricular septum into the myocardium?
Purkinje fibers
Does a nerve provided impulses for many muscle fibers or just few?
A nerve can stimulate impulses to several muscle fibers. When muscle fibers are grouped they form a single muscle group like the biceps.
Muscle fibers contract and relax in response to what?
nerve impulses
What carries odor impulses to the cerebrum for interpretation?
nerve fibers?
Impulses carried to the heart by means of fibers that secrete acetylcholine are what?
parasympathetic impulses and cause the heart rate to decrease
What is the role of Purkinje fibres in the heart?
The Purkinje fibers work with the sinoatrial node to enable consistency in the contractions of the heart.Purkinje fibers are muscle fibers in the heart. They relay the contraction impulses from the bundle to the myocardium of the ventricles.Purkinje fibres transmit the signal that tells the heart to beat from the pacemakers to the heart muscle. They are even capable of generating their own signal if the pacemaker is damaged.
Which Mineral is necessary for transmission of nerve impulses in the nerve fibers?
Zinc
What is the optics?
It is a bundle of nerve fibers that carry electrical impulses to the brain from the retina.
