Neuron Anatomy and Action Potential Physiology Quiz

Resting Membrane Potential (RMP)

• The resting membrane potential (RMP) of a medium-sized nerve is typically around -70mV.

Stimulus Intensity

• The minimal intensity of stimulus needed to excite the nerve and produce an action potential is called the threshold stimulus.

Potassium Channels

• The slow closure of K+ channels and continuous outflow of K+ leads to the repolarization of the neuron.

Electric Potential

• The difference in electric potential between the inside and outside of the membrane of the nerve under resting conditions is called the resting potential, with the inside being negative in relation to the outside.

Local Response

• A subthreshold stimulus produces a local response, which are local changes in membrane potential.

Depolarization

• Depolarization in a neuron is caused by an inward flow of positively charged ions (e.g. Na+ or Ca2+) or an outward flow of negatively charged ions (e.g. Cl-).