September 24, 2014 Exercise 5: Cardiovascular Dynamics: Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate Lab Report Pre-lab Quiz ResultsYou scored 100% by answering 5 out of 5 questions correctly. 1. Blood flow is measured inYou correctly answered: b. ml/min. 2. Which of the following has the greatest effect on blood flow? You 3. Which of the following would not result in a decrease in the blood vesselradius? You correctly answered: c. vasodilation 4. The diameter of the blood vessel is the same asYou correctly answered: 5. The opening of the blood vessel where the blood flows is called the You Experiment ResultsPredict Question:Predict Question 1: What do you thinkwill happen to the flow rate if the radius is increased by 0.5 mm? Your Predict Question 2: Do you think a graph plotted with radius on the X-axis and flow rate on the Y-axis will be linear (a straight line)?Your answer : b. Stop & Think Questions:What is the driving force for blood flow?You How does the body increase the blood vessel radius? You correctly Experiment Data: Flow (ml/min) Radius (mm) Viscosity Length (mm) Pressure (mm Hg) 4.0 1.5 1.0 50 100 12.6 2.0 1.0 50 100 30.7 2.5 1.0 50 100
63.6 3.0 1.0 50 100 117.8 3.5 1.0 50 100 201.0 4.0 1.0 50 100 321.9 4.5 1.0 50 100 490.6 5.0 1.0 50 100 Post-lab Quiz ResultsYou scored 100% by answering 4 out of 4 questions correctly. 1. The variable that you altered in this activity was You correctly answered: 2. Vessel radius and fluid flowYou correctly answered: b. are directly 3. After a heavy meal, when we are relatively inactive, we might expect blood vessels in the skeletal muscles to be somewhat __________ and theblood vessels in the digestive organs to be somewhat __________.You 4. When you increased the flow tube radius, the fluid flow rate You Review Sheet Results1. Explain how the body establishes a pressure
2. Explain the effect that the flow tube radius change had on flow rate. Howwell did the results compare with your prediction?Your answer:As the flow
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- Fall '14