Lab Worksheet DONE | Blood and the Heart | with pre-lab and post-lab questions

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Pre-Lab Questions: “1. Research the process of erythropoiesis, and explain the role erythropoietin plays. Why is this a popular “doping” drug for athletes? “ Erythropoieses is the process t... o produce red blood cells. There is a decrease of oxygen in circulation. The kidneys then secrete erythropoietin which stimulaes proliferation and differentiation of red cell precursors. This usually occurs in the red bone marrow. Blood doping is any attempt to improve by increasing you red blood cell count. The more red blood cells, the greater your energy expenditure you have during physical activity. To do this you can get a transfusion of red blood cells, reinfuse your own red bloods cells, or take an enhancement drug called EPO. “2. How would the hemoglobin content differ in a person living in Philadelphia (Elevation: 39 feet) compared to someone living in Denver (Elevation: 5280 feet)? Why? “ The person living in Philadelphia would have a lower content than someone living in Denver. Experiment 1: Heart Valves and Pumps Table 2: Experimental Observations Observations (with valve) and mL H2O Displaced? Observations (without valve) and mL H2O Displaced? Water was able to move through the valve. About 5ml. Water was able to move through. About 10 ml. Post-Lab Questions “1. What happened when you pressed on the balloon stretched over the jar? What does this result represent? “ Water moved through the valve. This represents the heart contracting. “2. What structure in this experiment mimics a heart valve? “ The balloon neck. “3. How did the valve influence the experimental results? If possible, indicate the difference (in mL) in water displaced with the valve versus without the valve. Does the valve enhance the water flow, and why? “ In my experiment the water moved easier without the valve. About 5 ml more was moved without the valve. “4. What other organs or body systems incorporate valves? How are they used? “ Lymph ducts contain valves. [Show More]

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