Answer
A change in membrane potential from -70 mV to -80 mV is a hyperpolarizing graded potential. This change causes the membrane potential to get more negative than the resting potential
Work Step by Step
As the membrane potential falls from -70 mV to -80 mV and below ( -90 mV, -100 mV), the neuron becomes more greatly hyperpolarized. It is very difficult for a hyperpolarized neuron to generate an action potential (AP).
