What Is The Threshold Voltage In An Axon? A stimulus from a sensory cell or another neuron depolarizes the target neuron to its threshold potential (−55 mV). Na+ channels in the axon hillock open, allowing positive ions to enter the cell (Figure 1). Once the sodium channels open, the neuron completely depolarizes to a membrane
Can We Sense And Be Affected By Stimuli Below The Absolute Threshold? Can we sense and be affected by stimuli below the absolute threshold? As the intensity of a stimulus increases, we are more likely to perceive it. Stimuli below the absolute threshold can still have at least some influence on us, even though we
Do All Neurons Have The Same Threshold? Do all neurons have the same threshold? Although cells can appear similar, they can differ in important details at the molecular level. Different neurons use different combinations of ion channels in their membranes. Diversity of ion channels results in neurons having different thresholds, excitability, and firing patterns. Is