osteo

*gated calcium channels only open for Ca+*

once the calcium in the body is let through the calcium gates, the vesicles travel downward and open up to release ACh into the synaptic cleft, the space between the axon terminal and the sarcomere . once in the synaptic cleft, ACh molecules bind to to the gated sodium channels on the sarcomere.

*gated sodium channels only open if ACh binds, and lets Na+ cross*

this lets Na+ enter the sarcomere. the Na+ molecules travel to the T tubule, and get distributed deeper. eventually, they reach the SR (sarcoplasmic reticulum) where they find more gated sodium channels to bind to.

*sarcoplasmic reticulum is the holding tank for more calcium*

((action potential is released from the brain as electricity and travels through the motor neuron(s) that is in charge of the muscle that the organism wants to move))

myosin heads grab on to the binding sites in the actin, but only if the tropomyosin is moved out of the way.

*calcium binds to the troponin on tropomyosin, causing the protein to change shape and move out of the way, facilitating the myosin heads to bind to the binding sites in actin.*

undiscerning

and it's dragging all of us along by the neck

world keeps turning

we are burning

life has taken its time

love has taken its toll

life has taken you far