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What would happen if a nerve fiber was stimulated from both ends simultaneously?
Wiki User
∙ 16y ago
The neural activity progresses as if it were a wave (the effect moves but the nerve, of course does not). As the wave progresses it depolarizes the nerve surface, opens Na+ channels and activates the nerve surface as it goes forward. One effect of the firing however is that the Na+ channels inactivate and enter a refractory period in which they will not reopen. This essential drives the propagation wave in one direction only.
If the nerve were to be simultaneously stimulated at both ends the two waves would meet and then activity would cease. Neither wave would be able to overcome the refractory membrane that the other wave had passed over.
Wiki User
∙ 16y ago
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Muscle cell are stimulated by nerve fiber called a?
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An electrical impulse moving down an axon is called?
This is called action potential. Action potential is the change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated, serving to transmit nerve signals.
Vagal escape occurs when heart is stimulated by what?
Vagal escape occurs when the parasympathetic nervous system, specifically the vagus nerve, fails to regulate the heart rate and the heart muscle is instead stimulated by other mechanisms. This can happen in situations where there is a prolonged increase in sympathetic nerve activity or when there is a dysfunction in the parasympathetic nervous system.
A young woman is brought to the emergency room with extremely dilated pupils Her friends say that she has overdosed on cocaine What cranial nerve is stimulated by this drug?
maybe the oculomotor nerve is affected( whIcH we alreadY kNown thaT tHe fUnctiON of oculomotor nerve is a mOtor to mOve the eyebAll aNd parasyMpathetic nerve fiber tO cOstriCt tHe pupil) and if thIs nerVe was erruPted,the pUpil will be dilaTed or extremeLy dilated
What is required to maintain nerve fiber sheath?
required to maintain nerve fiber sheath
What is the difference between the contour and magnitude of single nerve fiber and nerve trunk?
What is the difference between the contour and magnitude of single nerve fiber and nerve trunk?
What happens when a nerve cell is stimulated by another nerve cell?
they go nerve to nerve till it gets to the brain first is a nerve then the dendrite then the brian
Which nerve fiber do impulses travel slowly?
Impulses travel more slowly through unmyelinated nerve fiber.
When a muscle is stimulated do all motor units fire why or why not?
When a muscle is stimulated not all motor units in the nerve are fired. More muscle fibers are stimulated, however and smaller nerves are stimulated before larger ones.
How is a resting potential achieved in the nervous system?
The resting nerve cell is not being stimulated to send a nerve impulse
What fiber transmits impulses to the central nervous system?
The nerve fiber.
What is an excitable nerve cell that sends electrical signals?
A neuron is an excitable nerve cell that sends electrical signals when stimulated
