Osmosis is the movement of water from a high concentration to a low concentration.
True or False

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

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.