Final answer:
Fluid flow is regulated differently by valve opening versus valve closing. When a valve is opened, there is increased flow, while when a valve is closed, there is a decrease in flow.
Step-by-step explanation:
Fluid flow is regulated differently by valve opening versus valve closing. When a valve is opened, fluid can flow through the valve, resulting in increased flow. On the other hand, when a valve is closed, fluid is prevented from flowing through the valve, leading to a decrease in flow.
For example, in the cardiovascular system, the opening and closing of valves regulate the flow of blood. When the valves are open, blood can flow freely through the vessels, whereas when the valves are closed, blood flow is restricted.
Overall, valve opening increases fluid flow, while valve closing decreases fluid flow.