The simultaneous arrival of graded depolarization and a graded hyperpolarization of equal but opposite magnitude at a particular location on the dendritic membrane is likely to cancel the effects of each other.
They cause transient, subtle changes in membrane potentials associated with neuronal dendrites.
The magnitude of the change depends on the magnitude and duration of the stimulus.
They can be depolarized or hyperpolarized.
Gradual depolarization caused by sodium or calcium ion penetration.
Gradual hyperpolarization caused by excretion of potassium ions or entry of chloride ions. Thus, when equal but opposite degrees of graded depolarization and hyperpolarization occur at a given dendrite of a neuron, the positive and negative charges neutralize each other and have little or no effect on the total membrane potential. .
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