Principles of Anatomy and Physiology
16th Edition
ISBN: 9781119662792
Author: Tortora, Gerard J., DERRICKSON, Bryan H.
Publisher: WILEY
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Question
Chapter 20, Problem 20CP
Summary Introduction
To review:
The definition of stroke volume (SV) and the factors that regulate it.
Introduction:
A large amount of blood moves out from the ventricles into the arteries (aorta in the left ventricle and pulmonary artery in the right ventricle) during ventricular systole or depolarization. The blood from the aorta is supplied to distant parts of the body.
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Define each of the three variables, and describe the factors that influence each variable and how each variable affects stroke volume.
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Define stroke volume and describe how stroke volume is regulated
Chapter 20 Solutions
Principles of Anatomy and Physiology
Ch. 20 - l. Define each of the following external features...Ch. 20 - 2. Describe the structure of the pericardium and...Ch. 20 - 3. What are the characteristic internal features...Ch. 20 - Prob. 4CPCh. 20 - 5. What is the relationship between wall thickness...Ch. 20 - Prob. 6CPCh. 20 - What causes the heart valves to open and to close?...Ch. 20 - In correct sequence, which heart chambers, heart...Ch. 20 - Prob. 9CPCh. 20 - Prob. 10CP
Ch. 20 - 11. In what ways are autorhythmic fibers similar...Ch. 20 - What happens during each of the three phases of an...Ch. 20 - 13. In what ways are ECGs helpful in diagnosing...Ch. 20 - How does each ECG wave, interval, and segment...Ch. 20 - 15. Why must left ventricular pressure be greater...Ch. 20 - Prob. 16CPCh. 20 - During which two periods of the cardiac cycle do...Ch. 20 - Prob. 18CPCh. 20 - Prob. 19CPCh. 20 - Prob. 20CPCh. 20 - Prob. 21CPCh. 20 - Define cardiac reserve. How does it change with...Ch. 20 - Prob. 23CPCh. 20 - 24. What are some of the cardiovascular benefits...Ch. 20 - Prob. 25CPCh. 20 - Prob. 26CPCh. 20 - Why is the cardiovascular system one of the first...Ch. 20 - From which tissue does the heart develop?Ch. 20 - Gerald recently visited the dentist. During the...Ch. 20 - 2. Unathletic Sylvia resolves to begin an exercise...Ch. 20 - 3. Mr. Perkins is a large, 62-year-old man with a...
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- Given heart rate of 95 beats per minute, blood pressure of 125/90 mmHg, 0.2 mL O₂/mL systemic blood arterial oxygen content, 0.1 mL O₂/mL pulmonary arterial oxygen content, and 400 mL O₂/min oxygen consumption. Based on the information, calculate the i) stroke volume. and ii) total peripheral resistance. Show your work.arrow_forwardDefine stroke volume (SV)arrow_forwardWhat is stroke volume, and what are two ways to increase it?arrow_forward
- Explain the factors that increase and decrease stroke volume, stroke volume index, and cardiac output?arrow_forwardDiscuss how changes in EDV and force of contraction with exercise affect stroke volume.arrow_forwardWhich are the major factors responsible for limiting the increase in stroke volume?arrow_forward
- A person has an ejection fraction of 54% and an EDV of 130 mL. a) what is their stroke volume b) if they have a heart rate of 65 beats per minute, what is the cardiac output? c) If they increase their ED to 170 mL, what do you expect might happen to their ejection fraction (improve, stay the same or get worse)? Why- be complete in your answer. d) What law is this? e) How might the EDV be increased? Give at least one mechanism in detailarrow_forwardWhat three factors determine stroke volume? How does the stroke volume differ with each factor?arrow_forwardAs the stroke volume index increases or decreases, the cardiac index also increases or decreases. True or false? Explain?arrow_forward
- There are three major factors that affect stroke volume and therefore affect cardiac output: afterload, preload, and contractility. Select two of these factors and explain how and why each affects cardiac output.arrow_forwardThere are three major factors that affect stroke volume and therefore affect cardiac output: afterload, preload, and contractility. Explain how and why each of these factors affects cardiac output. Each answer must explain what the factor is as well as how it affects cardiac output.arrow_forwardDefine Cardiac Output, give its relationship with Stroke Volume.arrow_forward
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