Physioex 5:1 Essays

641 Words Feb 22nd, 2013 3 Pages
Exercise 5: Cardiovascular Dynamics: Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. Blood flow is measured in You correctly answered: b. ml/min. 2. Which of the following has the greatest effect on blood flow? You correctly answered: a. blood vessel radius 3. Which of the following would not result in a decrease in the blood vessel radius? You correctly answered: c. vasodilation 4. The diameter of the blood vessel is the same as You correctly answered: b. two times the radius of the blood vessel. 5. The opening of the blood vessel where the blood flows is called the You correctly answered: b. lumen.

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constricted, dilated 4. When you increased the flow tube radius, the fluid flow rate You correctly answered: a. increased.

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Review Sheet Results 1. Explain how the body establishes a pressure gradient for fluid flow. Your answer: The body establishes a pressure gradient for fluid flow due to the pressure difference between the two ends of the vessel. 2. Explain the effect that the flow tube radius change had on flow rate. How well did the results compare with your prediction? Your answer: The larger the radius, the greater the laminar flow and vice versa. Since the vessel is larger, there's more room for the blood to move through, thus increasing laminar flow. My predictions were correct 3. Describe the effect that radius changes have on the laminar flow of a fluid. Your answer: The larger the radius, the greater the laminar flow and vice versa. Since the vessel is larger, there's more room for the blood to move through, thus increasing laminar flow. 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? Your answer: When the flow rate increases it is because the radius increased causing it not to be linear.

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