Activity 1:
3. Describe the effect that radius changes have on a laminar flow of a fluid.
4. Why do you think the plot was not linear? (Hint: Look at the relationship of the variables in the equation.) How well did the results compare with your prediction?
Activity 2:
2. Explain the effect that the viscosity change had on flow rate. How well did the results compare with your prediction?
3. Describe the graph of flow versus viscosity.
4. Discuss the effect that polycythemia would have on viscosity and on blood flow.
Activity 3:
1. Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? Explain why.
2. Explain the effect that the change in blood vessel length had on flow rate. How well did the results compare with your prediction?
3. Explain why you think blood vessel radius can have a larger effect on the body than changes in blood vessel length (use the blood flow equation).
4. Describe the effect that obesity would have on blood flow and why.
Activity 4:
1. Explain the effect that pressure changes had on flow rate.
2. How does the plot differe from the plots for tube radius, viscosity, and tube length?
3. Explain why pressure changes are not the best way to control blood flow.
4. Use your data to calculate the increase in flow rate in ml/min.mm Hg.
Activity 5:
1. Explain the effect of increasing the right flow tube radius on the flow rate, resistance, and pump rate.
2. Describe what the left and right beakers in the experiment correspond to in the human heart.
3. Briefly describe how the human heart could compensate for flow rate changes to maintain blood pressure.
Activity 6:
1. Describe the Frank-Starling law in the heart.
2. Explain what happened to the pump rate when you increased the stroke volume. Why do you think this occurred?
3. Describe how the heart alters stroke volume.
4. Describe the intrinsic factors that control stroke volume.
Activity 7:
1. Explain how the heart could compensate for changes in peripheral resistance.
2. Which mechanism had the greatest compensatory effect?
3. Explain what happened when the pump pressure and the beaker pressure were the same.
4. Explain whether it would be better to adjust heart rate or blood vessel diameter to achieve blood flow changes at a local level (for example, in just the digestive system).
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