The Ultimate Limitation to the Number of Nerve Action Potentials

Multiple Choice

The ultimate limitation to the number of nerve action potentials we can send to a muscle per second is

A) the speed with which sodium ions can be pumped back outside the nerve membrane.
B) the strength of the nerve action potential.
C) whether action potential is detected as being pain,sound,or some other sense.
D) the number of neurons and synapses involved.
E) the type of muscle.