Take for example - you touching something sharp and instantly moving your hand away.
Sensory neurons in your fingers detect the external stimuli of the sharp object and send a nerve impulse to the spinal cord (does not reach brain) and is sent back to a motor neurone - attached to an effector that moves the muscle and moves the hand away. This is a rapid reflex action and involuntary.
<span>surface faulting moves the ground in different directions</span>
I think that the answer is thousands
Well Dna makes Rna Which makes protein if thats what you mean
