PhysioEx Exercise 5 Activity 3

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School

West Hills College, Coalinga *

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Course

35

Subject

Chemistry

Date

Dec 6, 2023

Type

pdf

Pages

3

Report

Uploaded by JudgeBook11690

PhysioEx Lab Report Exercise 5: Cardiovascular Dynamics Activity 3: Studying the E ff ect of Blood Vessel Length on Blood Flow Rate Name: Joseph Ramirez Date: 19 October 2023 Session ID: session-cc518724-218a-f768-8473-324a02c4942a Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. Experiment Results Predict Question Stop & Think Questions When the length of the blood vessel increases, which of the following also increases? You correctly answered: both friction and surface area. 1 Blood vessel length decreases You correctly answered: when we lose weight. 2 Blood ow is You correctly answered: directly proportional to vessel radius to the fourth power. 3 Which of the following correctly describes resistance to ow? You correctly answered: Resistance to ow increases with increased vessel length. 4 Predict Question: What e ff ect do you think increasing the ow tube length will have on the uid ow rate? Your answer: The uid ow rate will decrease. 1 What is the relationship between uid ow and ow tube length? 1
Experiment Data Flow (ml/min) Radius (mm) Viscosity Length (mm) Pressure (mm Hg) 90.8 3.0 3.5 10 100 60.6 3.0 3.5 15 100 45.4 3.0 3.5 20 100 36.3 3.0 3.5 25 100 30.3 3.0 3.5 30 100 26.0 3.0 3.5 35 100 22.7 3.0 3.5 40 100 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. You correctly answered: They are inversely proportional to each other. Which is more likely to occur on a daily basis? You correctly answered: changes in blood vessel diameter. 2 Increasing the ow tube length is analogous to increasing blood vessel length. How did this a ff ect the ow rate? You correctly answered: The ow rate decreased. 1 Which of the following correctly describes the relationships between blood vessel length, resistance, and blood ow? You correctly answered: Blood vessel length is directly proportional to resistance and inversely proportional to blood ow. 2 Which of the following correctly describes the relationships between blood vessel radius, resistance, and blood ow? You correctly answered: Blood vessel radius is inversely proportional to resistance and directly proportional to blood ow. 3
Review Sheet Results Which of the following describes why the body might require an increase in vessel radius? You correctly answered: to provide more blood ow and, therefore, nutrients to a particular body part. 4 Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? Explain why. Your answer: A change in blood vessel radius is more likely to occur because blood vessel length stays pretty constant throughout one's life unless they have a major weight change. Blood vessel radius changes constantly throughout the day. 1 Explain the e ff ect that the change in blood vessel length had on ow rate. How well did the results compare with your prediction? Your answer: The longer the vessel length, the greater the resistance, therefore increasing the vessel length decreases ow rate. 2 Explain why you think blood vessel radius can have a larger e ff ect on the body than changes in blood vessel length (use the blood ow equation). Your answer: Radius is multiplied to the 4th power, the length is not. 3 Describe the e ff ect that obesity would have on blood ow and why. Your answer: Obesity would decrease blood ow because major weight gain lengthens blood vessels which in turn increases resistance and decreases blood ow. 4
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