Learn about depolarization, hyperpolarization, and action potentials in neurons with Khan Academy's comprehensive biology resources.

Let me see if I understand this: Basically, a graded potential is a shift in the membrane potential, charge difference (in mV across the membrane) that may or may not cause an action potential.

This video explains neuron graded potentials, detailing how they are created and why they decay over time and distance. It highlights the role of neurotransmitter receptors and ion channels in …

Graded potentials are small changes in membrane potential that are either excitatory (depolarize the membrane) or inhibitory (hyperpolarize the membrane). Many excitatory graded potentials …

Neuron action potential description Neuron action potential mechanism Effects of axon diameter and myelination Action potential patterns Action potential velocity

It works on the basic principle: action potential leads to opening up of Na+ ions and even more entering of Na into the cell, increased voltage opens up vesicles which release neurotransmitters.

Can someone explain the difference between a grade potential and an action potential?

As the action potential travels down the axon, positive ions continue to flood the cell. Eventually, this influx reaches the very end of the neuron – the axon terminal. When this happens, the …

Action potentials, however, are consistently the same size and duration for any given neuron, so that the information contained in the graded potentials is, instead, converted into a temporal …

Through a series of simulation-based practice questions, you'll be able to zoom in on a neuron membrane, watch as ions rush in and out of the cell in response to a stimulus, and witness …