The relative concentration of solute inside and outside a call can cause water molecules to move across the membrane, which phrase would be an alternate it to the diagram

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature