Question

Choose the statement below that accurately represents a significant feature of graded potentials. Graded potentials activate enzymes to excite the cell. Like graded potentials will subtract from each other to create a smaller graded potential. Like graded potentials can sum to create a larger graded potential. Graded potentials randomly occur all the time but are of no significance.

Answer 1

graded potentials can sum to create a larger graded potential.

Step-by-step explanation:

Two types of summation occurs in the graded potential;

Temporal summation occurs when graded potentials within the postsynaptic cell occur so rapidly that they build on each other before the previous ones fade. Spatial summation happens when postsynaptic potentials from adjacent synapses on the cell occur simultaneously and add together.

This increases the resting membrane potential to about –70 mV from around the typical neuron threshold potential ranging from –40 mV to –55 mV.