PhysioEx Exercise 5 Activity 5

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Saddleback College *

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Mechanical Engineering

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Dec 6, 2023

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10/26/23, 9:41 PM PhysioEx Exercise 5 Activity 5 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act5/ 1/3 PhysioEx Lab Report Exercise 5: Cardiovascular Dynamics Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity Name: Hayley Johnson Date: 26 October 2023 Session ID: session-6dda9104-5ed0-c5c1-6acf-487199779908 Pre-lab Quiz Results You scored 80% by answering 4 out of 5 questions correctly. Experiment Results Predict Question Stop & Think Questions Experiment Data The heart is resting during You correctly answered: ventricular diastole. 1 The right side of the heart pumps blood You correctly answered: to the lungs. 2 The layer of the blood vessel that is stimulated by the autonomic nervous system is You correctly answered: smooth muscle. 3 In the experiment, the pump simulates You correctly answered: the left ventricle of the heart. 4 If the right beaker simulates the flow of blood to the systemic circuit of the body, what do the right valve and flow tube represent? Your answer: aortic valve and pulmonary veins. Correct answer: aortic valve and aorta. 5 Predict Question: If you increase the flow tube radius, what will happen to the pump rate to maintain constant pressure? Your answer: The pump rate will decrease. 1 When the piston of the pump reaches its lowest point, the volume remaining in the pump is the You correctly answered: end systolic volume. 1 If you increase the right flow tube radius, what will happen to resistance and flow rate? You correctly answered: Flow rate will increase and resistance will decrease. 2 If the left flow tube represents the pulmonary veins, what does the left source beaker represent? You correctly answered: blood coming from the lungs. 3
10/26/23, 9:41 PM PhysioEx Exercise 5 Activity 5 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act5/ 2/3 Flow (ml/min) Rad. L (mm) Rad. R (mm) Str. V (ml) Rate (strokes /min) Press. L (mm Hg) Press. Dif. R (mm Hg) 6607.2 3.5 3.0 70 94.4 40 40 9423.9 3.5 3.5 70 134.6 40 40 11882.5 3.5 4.0 70 169.8 40 40 13798.3 3.5 4.5 70 197.1 40 40 15198.7 3.5 5.0 70 217.1 40 40 Post-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. Review Sheet Results The pump piston in the simulation is up during You correctly answered: diastole. 1 The pump in the simulation represents the You correctly answered: left ventricle. 2 The amount of blood flowing into the destination beaker (right beaker) with a single pump is called the You correctly answered: stroke volume. 3 In this experiment, the increase in right flow tube radius resulted in You correctly answered: an increase in flow rate, which increased the pump rate. 4 Which chamber should be present in the flow pattern of the experiment, given that the vessels and valves surrounding it are present (the chamber was omitted from the experiment for simplicity)? You correctly answered: left atrium. 5 Explain the effect of increasing the right flow tube radius on the flow rate, resistance, and pump rate. Your answer: My prediction was incorrect. As the radius increases the pump rate increased. 1 Describe what the left and right beakers in the experiment correspond to in the human heart. Your answer: 2
10/26/23, 9:41 PM PhysioEx Exercise 5 Activity 5 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act5/ 3/3 The left beaker is the left ventricule while the right beaker corresponds to the aortic valve and aorta. Briefly describe how the human heart could compensate for flow rate changes to maintain blood pressure. Your answer: The human heart either reduces or increases the pump rate in orders to maintain blood pressure. 3
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