WALA: how to set out an explanation and write ideas in our own words.
Muscles move on commands from the brain. Single nerve cells in your spinal cord (called Motor
Muscles move on commands from the brain. Single nerve cells in your spinal cord (called Motor
Neurons) are the only way the brain connects to muscles. When a motor neuron thats inside your
spinal cord fires an impulse will go out from it to your muscles on this long and very thin extension
of that single cell which is called an axon.
When the impulse travels down that axon to your muscle a chemical is released. and at its
ending the muscles are made of long fibers all connected to each other longways by a
mechanism that allows the two parts of an to slide past each
other kind of like a ladder that extends. and then it can lock in a certain place. when the
chemical impulse hits your muscle it makes the muscle fibers ratchet past each other and the
muscle gets shorter and fatter when the impulses from the nerves stop the muscle
fibers slide back to their original position.
spinal cord fires an impulse will go out from it to your muscles on this long and very thin extension
of that single cell which is called an axon.
When the impulse travels down that axon to your muscle a chemical is released. and at its
ending the muscles are made of long fibers all connected to each other longways by a
mechanism that allows the two parts of an to slide past each
other kind of like a ladder that extends. and then it can lock in a certain place. when the
chemical impulse hits your muscle it makes the muscle fibers ratchet past each other and the
muscle gets shorter and fatter when the impulses from the nerves stop the muscle
fibers slide back to their original position.
