00:01
The correct answer would be your second option, negative 70, positive 30.
00:08
The resting membrane potential of a neuron is the electrical charge difference between the inside and the outside of the cell when the neuron is not actively transmitting signals.
00:17
It's usually around negative 70 millivolts in most neurons.
00:21
This negative charge inside the neuron is due to the higher concentration of negatively charged ions, such as chloride and proteins inside compared to outside.
00:31
Side, along with the selective permeability of the membrane to different ions through ion channels.
00:37
When a stimulus arrives and is strong enough to depolarize the neuron past its threshold, it triggers an action potential.
00:42
The threshold is the membrane potential at which the neuron becomes excitable and fires an action potential.
00:47
For many neurons, this threshold is around negative 55 millivolts...