In terms of the nervous system, yes.
The action potential is an all-or-none phenomenon.
"all-or-none principle." In this principle, once the threshold for firing an action potential is reached, it will occur at full strength regardless of the strength of the stimulus that triggered it.
it depends on the stimulation. if the stimulation is not strong enough, there might be no action potential. However, if the stimulation is strong enough, there will be an action potential
the all-or-none principle
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.
Yes, during th rising phase of an action potential you will see the spike which is representative of the threshold (all or none) occuring.
Their is none
All muscle cells and nerve cells use an action potential and also obey the all-or-none law
The strength of the an action potential would increase. This would happen because it would need twice as much energy before being produced.
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.
graded potential are by definition VARIABLE in strength, and therefore NOT all or none. They start out at their strongest strength, and degrade (become weaker) as they progress further along.
All or nothing response of an action potential (AP), refers simply to the fact that an AP will either occur, or not. There is no gradient, no half APs or double APs. The only option is AP, or no AP. Like in computer binary, the response is either 1 (an AP) or 0 (no AP). All the factors trying to induce (or inhibit) an action potential (i.e other action potentials, EPSPs and IPSPs) add up (summate) at the axon hillock, (aka the trigger zone). Here, if the stimulation is big enough an action potential will occur. If the stimulation is not big enough, no action potential occurs.