PhysioEx Exercise 5 Activity 1

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Wayland Baptist University, Lubbock *

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Mechanical Engineering

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Dec 6, 2023

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pdf

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10/23/23, 10:07 PM PhysioEx Exercise 5 Activity 1 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act1/ 1/3 PhysioEx Lab Report Exercise 5: Cardiovascular Dynamics Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate Name: Brittney Saenz Date: 23 October 2023 Session ID: session-cef49434-5c0e-2ee5-f1f2-be207daaa5fe Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. Experiment Results Predict Questions Stop & Think Questions Blood flow is measured in You correctly answered: ml/min. 1 Which of the following has the greatest effect on blood flow? You correctly answered: blood vessel radius. 2 Which of the following would not result in a decrease in the blood vessel radius? You correctly answered: vasodilation. 3 The diameter of the blood vessel is the same as You correctly answered: two times the radius of the blood vessel. 4 The opening of the blood vessel where the blood flows is called the You correctly answered: lumen. 5 Predict Question 1: What do you think will happen to the flow rate if the radius is increased by 0.5 mm? Your answer: The flow rate will increase. 1 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: no. 2
10/23/23, 10:07 PM PhysioEx Exercise 5 Activity 1 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act1/ 2/3 Experiment Data Flow Rate (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 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. What is the driving force for blood flow? You correctly answered: pressure gradient. 1 How does the body increase the blood vessel radius? You correctly answered: smooth muscle relaxation. 2 The variable that you altered in this activity was You correctly answered: vessel radius. 1 Vessel radius and fluid flow You correctly answered: are directly proportional. 2 After a heavy meal, when we are relatively inactive, we might expect blood vessels in the skeletal muscles to be somewhat and the blood vessels in the digestive organs to be somewhat . You correctly answered: constricted, dilated. 3
10/23/23, 10:07 PM PhysioEx Exercise 5 Activity 1 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act1/ 3/3 Review Sheet Results When you increased the flow tube radius, the fluid flow rate You correctly answered: increased. 4 Explain how the body establishes a pressure gradient for fluid flow. Your answer: by heart contraction the pressure gradient is established. 1 Explain the effect that the flow tube radius change had on flow rate. How well did the results compare with your prediction? Your answer: it is increased as predicted. 2 Describe the effect that radius changes have on the laminar flow of a fluid. Your answer: A smaller radius reduces the amount of fluid that can flow while increasing the radius can allow more fluid to flow. 3 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? Your answer: because the radius has changed and more fluid can flow each time. 4
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