Principles of Anatomy and Physiology
15th Edition
ISBN: 9781119329398
Author: Gerard J Tortora, Bryan Derrickson
Publisher: John Wiley & Sons Inc
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Textbook Question
Chapter 20, Problem 22CP
Define cardiac reserve. How does it change with training or with heart failure?
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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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- Discuss the regulation of cardiac output during exercise.arrow_forwardDefine cardiac output, describe the factors that influence heart rate and stroke volume, and explain how adjustments in stroke volume and cardiac output are coordinated at different levels of physical activity.arrow_forwardIntegrate the factors that determine stroke volume and heart rate?arrow_forward
- Explain briefly what happens to your heart rate before and after performing an exercise? Why does your heart rate change before and after performing an exercise?arrow_forwardOther than heart rate what are two other variables that increase with exercise and why do they increase? Possibly variables include systolic BP, Diastolic BP, MAP, R-T interval, etc.arrow_forwardDescribe the effect of exercise on cardiac outputarrow_forward
- Describe the physiology behind the change in blood pressure and heart rate change after exercisearrow_forwardg. An individual has a stroke volume of 60 ml, End systolic volume of 50 ml, and a heart rate of 65 bpm. Calculate the following: i. Cardiac Output (CO) = ii. End diastolic volume (EDV) = iii. Ejection fraction (%) =arrow_forwardTo check- in Heart electrical activity use blood pressure :Select one True Falsearrow_forward
- Explain why afterload is critical in cardiac function and maintaining long-term heart health (i.e. heart failure). Hint: Decreased output, by itself, not lead to heart failure.arrow_forwardDefine cardiac output, and explain how it is influenced by both heart rate and stroke volume.arrow_forwardDefine blood pressure and describe and compare specific types (e.g. arterial, MABP, venous, PP). Include their expected values or ranges. Explain what happens to pressure when blood flows further away from the heart. During the rest period before starting an exercise routine where is most of the blood concentrated? Upon initiating exercise what happens to blood flow and pressure?arrow_forward
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