PRIN.OF HUMAN ANATOMY (LL)
15th Edition
ISBN: 9781119662761
Author: Tortora
Publisher: WILEY
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Textbook Question
Chapter 20, Problem 12CP
What happens during each of the three phases of an action potential in ventricular contractile fibers?
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Chapter 20 Solutions
PRIN.OF HUMAN ANATOMY (LL)
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Why do the coronary arteries carry a greater blood flow during ventricular relaxation than they do during ventricular contraction?arrow_forwardPressure changes that occur during the cardiac cycle are responsible for what two physiologic processes within the heart?arrow_forwardDescribe the electrical event in the heart that occurs during each of the following: (a) the QRS wave of the ECG; (b) the T wave of the ECG; (c) the P-R interval of the ECG.arrow_forward
- Define the term isovolumetric ventricular relaxation?arrow_forwardHow does the long plateau of the cardiac action potential develop and what is its functional role?arrow_forwardDoes the right ventricular stroke work index (RVSWI) measure the amount of work required by the right ventricle to pump blood? How?arrow_forward
- How does the cardiac contractile refractory period differ from a typical skeletal muscle refractory period?arrow_forwardExplain the term isovolumetric ventricular contraction?arrow_forwardWhich part of the intrinsic conduction system directly excites ventricular myocardial cells? In which direction does the depolarization wave travel across the ventricles?arrow_forward
- Regarding the cardiac cycle at resting HR, when in the cycle does ventricular filling occur? Howimportant is atrial contraction to the EDV? Why is the first part of ventricular contraction isovolumetric?When and why does rapid ejection of blood from the ventricle occur?arrow_forwardExplain how an action potential occurs in cardiac contractile fibers.arrow_forwardWhat action potential of specialized heart cells know the function of each channel and the process?arrow_forward
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