Question

A nerve is being stimulated with a submaximal stimulus. Are there any motor units that have been recruited?

Answer 1

Submaximal Stimulus- Stimuli of increasing strength that create more action potentials along more neurons.

Answer 2

AH! Here is the key piece of information. "When the muscle fibers in a motor unit contract we say that the motor unit has been recruited."

So if a nerve is being stimulated with increasing strength then yes, motor units have contracted and therefore have been recruited.