Lab 5: Cardiovascular Dynamics

1 .       Refer to Activity 1: Studying the Effect of Flow Tube Radius on Fluid Flow. What happened to fluid flow as the radius of the flow tube was increased? 

2 .       Because fluid flow is proportional to the fourth power of the radius, ____________ changes in the tube radius cause _____________ changes in fluid flow. 

3 .       How do our bodies control blood flow? Choose all that apply: 

4 .       Refer to Activity 2: Studying the Effect of Viscosity on Fluid Flow. How does fluid flow change as viscosity is modified?  

5 .       How does the effect of viscosity compare with the effect of radius on fluid flow? 

6 .       What would happen to the blood flow rate if the number of blood cells were to increase? 

7 .       Refer to Activity 3: Studying the Effects of Flow Tube Length on Fluid Flow. How does the flow tube length affect fluid flow? 

8 .       Refer to Activity 4: Studying the Effect of Pressure on Fluid Flow. How does driving pressure affect fluid flow? 

9 .       How does the plot in Activity 4 differ from the plots you have seen for the previous activities? 

10 .       Refer to Activity 5: Studying the Effect of Radius on Pump Activity. Which of the descriptions best explains why this graph differs from the radius plot in Activities 1-4 (Vessel Resistance)? 

11 .       As the right flow tube radius is increased, fluid flow rate ___________. This is analogous to ___________ of blood vessels in the human body. 

12 .       What would happen to the flow rate and the pump rate if the left flow tube radius is increased? 

13 .       Refer to Activity 6: Studying the Effect of Stroke Volume on Pump Activity. What happened to the pump's rate as its stroke volume was increased? 

14 .       Applying the simulation outcomes to the human heart, which of the following would be the likely result of increasing the stroke volume on cardiac output?  

15 .       What will happen to the pressure in the pump during filling if the valve in the right flow tube became leaky? [Hint]

16 .       What would occur if the aortic valve became slightly constricted? 

17 .       Refer to Activity 7: Studying Combined Effects. How is the flow rate affected when the right flow tube radius is kept constant at 3.0mm, and the left flow tube radius is modified either up or down? 

18 .       What happens to the flow and pump rate when you keep the end stroke volume constant and alter the start volume to manipulate stroke volume? [Hint]

19 .       If the left beaker pressure is decreased to 10 mm Hg, how is the pump-filling time affected? 

20 .       What happens to the pump rate if the filling time is shortened? 

21 .       What happens to fluid flow when the right beaker pressure equals the pump pressure? 

22 .       Refer to Activity 8: Studying Compensation. When the right flow tube radius is decreased, what happens to flow rate? 

23 .       If the right flow tube radius were decreased to a 2.5 mm radius, how could you adjust one or more of the other variables to prevent the flow rate from decreasing? Choose all that apply. 

24 .       Decreasing the right flow tube radius is similar to partial _____________ of the aortic valve or __________ resistance in the arterial system. 

25 .       In order to increase or decrease blood flow to a particular body system (e.g. digestive), what would be the best variable to adjust? 

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