What is the difference between a graded potential and action potential? How does this impact impulse...

What is the difference between a graded potential and action potential? How does this impact impulse transmission?

Expert Solution

Graded potential is the result of external stimulus in sensory neurons.
It results due to release of neurotransmitters in the synapse.
Intensity of graded potential depends upon the strength of signal.
Graded potential is seen in post synaptic cell.
It is associated with opening of chemical gated channels.
This potential occurs in dendrites.
Graded potential initiate action potential.

Action potential is commenced and initiated by depolarization of membrane yo the threshold.
Action potentials is observed when graded potentials approaches the axon hillock at a certain level of depolarisation (around -55mV).
This potential is observed in neurons.
It is associated with opening of ligand gated channels.
Action potentials are large and travel more.

A nerve impulse is a sudden reversal of electrical charge through the membrane of a resting neuron. It commences when the neuron receives a signal (chemical) from other cell.

Sydney Mullin answered 1 year ago

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