1) Describing how the brain transmits the message to muscles.

Trace impulse, list the steps in as much detail as possible, from which your brain transmits the message to the suitable muscles in order to step up one step.  Specifically involve the steps included in sending the impulse from neuron to the muscle fiber at neuromuscular junction.  Specify which muscles are pulling on which bones and what kind of the joints are included. 

Trace the impulse, list the steps in as much detail as possible, from which your brain transmits the message to the suitable muscles to reach up above your head to shelf.  Involve in this the steps included within the actual muscle fiber contraction – sliding the filament mechanism.  Again, state which muscles are pulling on which bones and what kind of joints are included.