Heart valves can have disorders with consequences that vary based on whether they are mild or severe. Some examples of these disorders include stenosis (where valves may stiffen and do not work as well) and regurgitation (where valves may leak). Consider a severe mitral valve regurgitation. If this valve were to leak, based on your knowledge of the pathway blood takes through the heart, what problem would you expect to occur?

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes