Biology 324 Human Anatomy and Physiology - Topics on Neurophysiology Biology 324 Human Anatomy and Physiology Topics on Neurophysiology 1. Ions distribute across cell membrane according to their electrochemical gradient.
Particles tend to move from area of high concentration toward area of low concentration.
The answer is in mV and gives the charge on the inside of the nerve. The magnitude of graded potentials, receptor potential and, postsynaptic potentials varies with stimulus strength. Due to opening of Na voltage-sensitive channels causing depolarization of the nerve's charge. This is followed by repolarization due to the opening of the K voltage-sensitive channel. A nerve's resting potential is around -70 mV and is mostly reflects the equilibrium potential for Na. 8.