PhysioEx Exercise 5 Activity 6

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10/20/22, 1:06 AM PhysioEx Exercise 5 Activity 6 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act6/# 1/4 PhysioEx Lab Report Exercise 5: Cardiovascular Dynamics Activity 6: Studying the Effect of Stroke Volume on Pump Activity Name: Kaiulani Franks, Kirsten Fletcher, Emran Jaber Date: 20 October 2022 Session ID: session-fda8b547-5863-f410-35c8-506a02e26ff8 Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. Which of the following variables directly contributes to preload? You correctly answered: venous return. 1 Which of the following would not increase end diastolic volume? You correctly answered: dehydration. 2 Increased contractility of the heart results in all but which of the following? You correctly answered: increased end systolic volume. 3 Which of the following does not affect stroke volume? You correctly answered: All of these affect stroke volume. 4 Which of the following is not equivalent to the others? 5
10/20/22, 1:06 AM PhysioEx Exercise 5 Activity 6 https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act6/# 2/4 Experiment Results Predict Question Stop & Think Questions Experiment Data Flow (ml/min) Rad. L (mm) Rad. R (mm) Str. V (ml) Rate (strokes /min) Press. L (mm Hg) Press. Dif. R (mm Hg) 5086.8 3.0 3.0 10 508.7 40 40 5086.8 3.0 3.0 20 254.3 40 40 5086.8 3.0 3.0 30 169.6 40 40 5086.8 3.0 3.0 40 127.2 40 40 You correctly answered: end diastolic volume. Predict Question: If the pump rate is analogous to the heart rate, what do you think will happen to the rate when you increase the stroke volume? Your answer: The pump rate will decrease to maintain cardiac output. 1 Why did changing the ending pump volume (ESV) automatically change the stroke volume? You correctly answered: The heart intrinsically alters stroke volume to accommodate changes in preload. 1 The flow has stayed constant with each trial because You correctly answered: cardiac output is equivalent to blood flow. 2 How does the heart provide for an increase in stroke volume? You correctly answered: by increasing contractility. 3
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