Students are measuring the rate of enzyme activity. the graph below shows the rate of enzyme action as they increase the temperature.

what is one possible reason for the sudden drop in the graph?

just go with your heart buddy

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.