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Period of reploarization of the neuron during which it cannot respond to a second stimulus?
Wiki User
∙ 13y ago
The absolute refractory period. This period occurs after the action potential has been initiated and is a result of inactivation of the sodium channels. These sodium channels would normally open up to allow sodium influx into the cell during an action potential. The absolute refractory period occurs during an ongoing action potential and is the period in which a subsequent action potential absolutely cannot be generated.
This should not be confused with the relative refractory period which occurs immediately following the absolute refractory period (during membrane hyperpolarization). During this period a subsequent action potential is possible, but more difficult to attain.
Wiki User
∙ 13y ago
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What controls sensation of heat?
Three types of sensory neurons are found in the skin. Aδ ("A-delta") fibers These are thinly-myelinated. They transmit signals in response to heat and touch. If the stimulus exceeds a certain threshold, the brain interprets these as acute pain. This is "good pain" because it warns you to do something to take care of the problems, e.g., a hot saucepan. C fibers These are unmyelinated and thus conduct impulses slowly. C fibers also respond to heat and touch. If the stimulus exceeds a certain threshold, the brain interprets these as diffuse, dull, chronic pain. This is "bad pain" because it cannot be alleviated simply by removing the stimulus. It is pain generated by such things as damaged tissue or pain that remains after the stimulus that caused acute pain has been removed. Aβ ("A-beta") fibers These are thickly-myelinated fibers. They mostly respond to painless stimuli such as light touch.
Why can't an action potential be generated during the absolute refractory period?
Action potentials cannot be generated during the absolute refractory period, as not enough ion channels are able to respond to the stimulus, no matter how large it is. Using Na+ fast channels as an example, during depolarization the "gate" of the channel is opened, allowing for Na+ influx into the cell. However, during the repolarization phase, a second "gate" marks the closure of the cell, preventing any further movement of ions into the cell. However, this also means that the channel is unable to open again until the second gate is removed, and the first gate returns back into place.
Period when a neuron cannot be restimulated because its sodium gates are open and an AP is being generated?
The refractory period.
What is it called when another neural impulse cannot occur?
THe absolute refractory period
What is occurring when a muscle cell cannot be stimulated during the absolute refractory period?
Repolarization
The neuron cannot respond to a second stimulus no matter how strong?
Absolute refractory period
What is the absolute refractory period?
Absolute Refractory Period:It is the interval during which a second action potential absolutely cannot be initiated, no matter how large a stimulus is applied.ORAfter repolarization there is a period during which a second action potential cannot be initiated, no matter how large a stimulus current is applied to the neuron. This is called the absolute refractory period, and it is followed by a relative refractory period, during which another action potential can be generated
Absolute refractory period relative refractory period?
In absolute refractory period, none of channels are reconfigured, so that second active potential cannot be generated no matter how large the stimulus current is applied to the neuron. In contrast, in relative refractory period, some but not all of channels are reconfigured, another action potential can be generated but only by a greater stimulus current thatn that originally needed.
What is correct in response or in respond?
A person can respond but a person cannot "in respond". It requires "in response to".I wanted to respond to my friend's email.In response to my friend's email, I sent him a humorous E-card.
Is it respond to or respond for?
It can be either one, depending on your meaning. You would "respond to" a question or comment directed at you. You would "respond for" someone else who cannot respond for themselves.
A stimulus that cannot be detected at least 50 of the time is said to be?
Subliminal.
Unicellular organisms cannot respond to their environment?
actually no, they can respond their environment from their special senses.
What cannot talk but will respond when spoken to?
an echo
Do viruses respond their environment?
No they can reproduce if they come across a host cell but cannot respond to their environment
Orginisms that respond to?
This is not a complete question, so it cannot be answered. All living thiings respond to something.
A virus cannot grow or respond to outside stimuli?
true
How do you respond on RSVP?
By saying you can and will attend or offering apologies if you cannot.
