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What is sub threshold Depolarization of nerves?
Sub threshold depolarisation of nerves, would be the influx of sodium (and maybe efflux of potassium depending) that doesn't cause enough depolarisation for an action potential to be fired. The summation of sub threshold depolarisations may cause an AP to be released. if they 'tip the balance' far enough. Hope this helps Edit: Above answer is vague. Sub threshold depolarizations do not occur as a result of efflux of potassium, which hyperpolarizes a neuron. They can be generated as EPSPs at the post synaptic membrane or result from persistant sodium channels, which do not completely inactivate (contributing to pacemaking activity). In both cases, gradual depolarization can lead to action potential generation.
Why does regeneration of the action potential occur in one direction?
As the action potential passes an area on the axon, sodium channels are closed, preventing influx of more sodium ions. At the same time, voltage-sensitive potassium channels open, allowing the membrane potential to fall quickly. After this repolarization phase, membrane permeability to potassium remains high, allowing for the "afterhyperpolarization" phase. During this entire period, while the sodium ion channels are forced closed, another action potential cannot be generated except by a much larger input signal. This helps to prevent the action potential from moving backwards along the axon.
How does frequency of stimulation affect action potentials?
The frequency of stimulation can affect the action potential by influencing the rate at which action potentials are generated in a neuron. Higher frequency stimulation can lead to more action potentials being fired in a shorter amount of time, while lower frequency stimulation may result in fewer action potentials being generated. This relationship is known as frequency-dependent facilitation or depression.
Is the neuron ready to fire during the refractory period?
No, the neuron is not ready to fire during the refractory period. This period occurs immediately after the neuron has fired and is characterized by a temporary inability to generate another action potential.
What does unexploded mean?
Unexploded is an adjective meaning "intact, not ruptured, having the potential to suddenly release a large amount of energy". It is generally used in reference to ammunition that was fired but did not ignite or detonate.
Does a large stimulus produce a higher amplitude in a action poteintial?
No, the amplitude of an action potential is constant and does not vary with the strength of the stimulus. Instead, the frequency of action potentials fired by a neuron can increase with a stronger stimulus.
What is the difference between a compound action potential and a single action potential?
Single action potentials follow the "all or none" rule. That is, if a stimulus is strong enough to depolarize the membrane of the neuron to threshold (~55mV), then an action potential will be fired. Each stimulus that reaches threshold will produce an action potential that is equal in magnitude to every other action potential for the neuron. Compound action potentials do not exhibit this property since they are a bundle of neurons and have different magnitudes of AP's. Thus compound action potentials are graded. That is, the greater the stimulus, the greater the action potential.
Is the intensity of the stimulus is indicated by what action potential?
Yes, the intensity of the stimulus can be indicated by the frequency of action potentials generated by the neurons in response to that stimulus. A higher intensity stimulus typically leads to a higher frequency of action potentials being fired by the neurons.
A period after an initial stimulus when a neuron is not sensitive to another stimulus is the?
refractory period. This is a brief time after a neuron has fired an action potential, during which it cannot generate another action potential in response to a new stimulus. This period is crucial for maintaining the directionality of signal transmission in the nervous system.
What happens to the neuron after an action potential is fired?
After an action potential is fired, the neuron goes through a refractory period where it cannot fire another action potential immediately. During this time, the neuron resets its electrical charge and prepares for the next signal.
What is reaction time in pe?
PE Theory definition: Reaction time is the name given to the ability to react quickly to an action e.g: reacting to the sportsgun being fired at the begining of a race.Scientific defintion: The time elapsed between a stimulus and an the response to it ( the effector).
How does a neuron indicate the strength of a stimulus?
A neuron conveys information about the strength of stimuli by varying the rate in which the stimulus is fired.
Why does action potential's move through axons in only one direction?
the axons and dentrites would get mixed up and the brain would be thinking in two ways and we would be confused to which one was which
How does the end plate potential differ from a EPSP on a post synaptic cell?
End plate potential is the change in potential from neurotransmitters. It can be excitatory or inhibitory. If the action potential wants to continue, it will be excitatory and vice versa. It can be additive, if more action potentials are fired it will increase the end plate potential. An action potential is an all or none response. It will either proceed or it will not proceed depending on the terms of the threshold. It cannot be additive, because there is an absolute refractory period where no additional action potentials can be fired.
What is sub threshold Depolarization of nerves?
Sub threshold depolarisation of nerves, would be the influx of sodium (and maybe efflux of potassium depending) that doesn't cause enough depolarisation for an action potential to be fired. The summation of sub threshold depolarisations may cause an AP to be released. if they 'tip the balance' far enough. Hope this helps Edit: Above answer is vague. Sub threshold depolarizations do not occur as a result of efflux of potassium, which hyperpolarizes a neuron. They can be generated as EPSPs at the post synaptic membrane or result from persistant sodium channels, which do not completely inactivate (contributing to pacemaking activity). In both cases, gradual depolarization can lead to action potential generation.
Can an former employer you were fired from tell potential employers 1 that you were fired and 2 why you were fired If not and this happened is there any legal action that can be taken this is in CA?
Doing that opens the former employer up to legal action if it can be proven. You should consult a lawyer. Actually, the employer has zero liability for defamation if it made a factual statement. "We investigated and then fired Jim for misconduct" is a factual statement, which cannot be liable or slander. The employer is not guessing about your motives, nor doing anything butdescribing ITS actions and motives honestly.
Does the glock 17 gen 4 only come in double action or can it come in the double action single action version too?
It only comes as a striker fired pistol - the design cannot accommodate a SA-type action (and the existing action isn't DA, to that end, as the striker fired mechanic is much different from a hammer fired mechanism).
