Determine which complex of the electron transport chain (respiratory chain) each phrase describes. Coenzyme Q is also called ubiquinone or ubiquinol, depending on whether it is in oxidized or reduced form.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.