2 In this activity, which of the following stayed constant? You correctly answered: ﬂow rate. 3
2/19/2020 PhysioEx Exercise 5 Activity 6 3/3 Review Sheet Results Which of the following is true? You correctly answered: ESV = EDV - SV. 4 Describe the Frank-Starling law of the heart. Your answer: The frank starling law is the relationship between how the heart stretches and the contractility. The changes are contractility changes the stroke volume and the left ventricular EDV. 1 Explain what happened to the pump rate when you increased the stroke volume? Why do you think this occurred? How well did the results compare with your prediction? Your answer: My prediction was right. The strong volume and pump rate are affected by the cardiac output. increased pressure= increased ﬂow rate. 2 Describe how the heart alters stroke volume. Your answer: this is described by the equation Cardiac Output= HR X Stroke Vol. If the body needs more blood, the heart will increase the CO by increasing HR and SV. 3 Describe the intrinsic factors that control stroke volume. Your answer: Preload, contractility, and afterload affect the stroke volume. PreLoad is the volume that the heart has to pump out, and contractility is adjusted by how hard the heart muscles create force, and increasing afterload also reduces stroke volume. 4
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- Spring '16
- Cardiology, session ID, Frank-Starling law of the heart