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Spikes of electrical activity recorded during an EMG that reflect the number of motor units activated when the patient voluntarily contracts a muscle
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The response of a motor unit to a single action potential of its motor neuron is called?
muscle twitch
How does an action potential differ from a graded potential?
Action potentials also known as spikes, differ from graded potentials in that they do not diminish in strength as they travel through the neuron.
Where do most action potentials originate?
initial segment
Can action potentials be summated?
no but generator potential can be summated
Why do not action potentials occur during the repolarization phase?
It has to do with what types of channels are open during this phase. In the repolarization phase the number of potassium channels are increased and the number of sodium channels are decreased. This allows for action potentials to not occur. Otherwise, the action potentials would add up and produce tetany.
Do action potentials become weaker with distance?
action potentials are non-decremental and do not get weaker with distance.
Response of a motor unit to a single action potential of it motor neuron is called?
muscle twitch
The response of a motor unit to a single action potential of its motor neuron is called?
muscle twitch
What do intercalated discs transfer from cell to cell?
action potentials, ionic currents, the force of contraction and ionic currents and action potentials only
How does an action potential differ from a graded potential?
Action potentials also known as spikes, differ from graded potentials in that they do not diminish in strength as they travel through the neuron.
Communication in the nervous system depends on?
action potentials
Where do most action potentials originate?
initial segment
A nerve impulse consists of a wave of?
Action Potentials
Does nervous tissue generate action potentials?
Yes.
Can action potentials be summated?
no but generator potential can be summated
Why do not action potentials occur during the repolarization phase?
It has to do with what types of channels are open during this phase. In the repolarization phase the number of potassium channels are increased and the number of sodium channels are decreased. This allows for action potentials to not occur. Otherwise, the action potentials would add up and produce tetany.
A neuron will generate action potentials when it?
A neuron will generate action potential when it is stimulated by a neurotransmitter.
