Respuesta :
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 and no change will occur in the membrane potential.
Explanation:
Graded potentials lead to temporary minor changes in the membrane potential associated with neuron’s dendrites. The amount of change caused depends upon the size and duration of the stimulus. These can be depolarizing or hyperpolarizing.
Graded depolarization occurs due to the entry of sodium or calcium ions; whereas, graded hyperpolarization occurs due to exit of potassium ions or entry of chloride ions.
When equal but opposite magnitude of graded depolarization and hyperpolarization occurs at a particular dendride of a neuron, the positive and negative charges get neutralized causing little or no effect on the total membrane potential.
The simultaneous arrival of graded depolarization and a graded hyper-polarization at a particular location of equal but opposite magnitude on the dendritic membrane is likely to cancel the effects of each other.
Graded potentials
They cause temporary minor changes in the membrane potential which is associated with neuron’s dendrites.
- The magnitude of change depends upon the size and duration of the stimulus.
- They can be depolarizing or hyperpolarizing.
- Graded depolarization caused by the entry of sodium or calcium ions.
- Graded hyper-polarization caused by the exit of potassium ions or entry of chloride ions.
Therefore, When graded depolarization and hyperpolarization of equal but opposite amount of occurs at a particular dendride of a neuron, the positive and negative charges neutralize each other which results in little or no effect on the total membrane potential.
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