Elucidating how the brain sends message to the muscles.
Trace the impulse and listing the steps in as much detail as possible, from that your brain sends the message to the suitable muscles to step up one step. Precisely include the steps involved in conveying the impulse from the neuron to the muscle fibre at the neuromuscular junction. Stipulate which muscles are pulling on which bones and what kind of joints are involved.
Trace the impulse listing the stages in as much detail as possible, from which your brain sends the message to the suitable muscles to reach up above your head to the shelf. Comprise in this the steps involved in the actual muscle fibre contraction - sliding filament mechanism. Yet again specify which muscles are pulling on which bones as well as what type of joints are complex