Principles of Anatomy and Physiology
15th Edition
ISBN: 9781119329398
Author: Gerard J Tortora, Bryan Derrickson
Publisher: John Wiley & Sons Inc
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Chapter 20, Problem 16CP
Summary Introduction
To review:
Whether the amount of blood flowing through the coronary artery during ventricular diastole or ventricular systole is more or less.
Introduction:
Apart from the pulmonary and systemic circular, coronary circulation also takes place, which supplies blood to different regions of heart. The vessels that supply blood to the myocardium are a part of the coronary circulation. The oxygenated blood from the aorta in the left atrium is picked up by two coronary arteries, each entering into the left and right atrium.
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Does more blood flow through the coronary arteries during ventricular diastole or ventricular systole? Explain your answer.
Use a flowchart to illustrate blood flow through systemic and pulmonary circulation, starting
from the aorta and making one complete cycle.
Include the following in your answer: atrioventricular valves, semilunar valves, heart chambers, all blood vessels. Indicate when blood is oxygen rich or oxygen poor at each stage of your flowchart.
During which phase of the cardiac cycle do the ventricles begin to contract while the semilunar valves remain closed ?
Group of answer choices
Isovolumetric contraction
Ventricular ejection
Ventricular filling
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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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
- Which process is being illustrated in the diagram (see picture)? Semilunar valves closed Atrioventricular valve open Aorta Superior vena cava Left atrium Right atrium Left wentricie Atroventricular valve open Right ventricle Infenor vena cava Systole Diastole Conduction Contractionarrow_forwardHow does exercise affect the coronary circulation? no effect on the coronary circulation per se stimulates growth of additional major coronary arteries decreases production of nitric oxide increases diameter of coronary arteriesarrow_forwardWhich represents time for the passage of the electrical impulse through the atrium, causing atrial depolarization. Which represents time for depolarization of both ventricles. Which represents time for ventricular repolarization. Which represents the time taken for the entire electrical depolarization and repolarization of the ventricles. ["QRS complex", "T wave", "P wave" , "P-R interval", "QRS interval", "ST segment", "QT interval"arrow_forward
- Compare and contrast pressure and volume changes of the left ?and right ventricles and the aorta during one cardiac cycle?arrow_forwardWhich is the correct answer?arrow_forwardGive a term to describe the statement. All valves are closed and the volume of blood remains constant within the relaxing ventricles.arrow_forward
- Draw a block schematic of the heart showing the four main chambers and explain how oxygenated and de-oxygenated blood flows to the lungs and arteries. You should include a labelled diagram of a typical electrocardiogram (ECG) and indicate how the primary features of the ECG relate to the state of the heart as it varies over the cycle.arrow_forwardWhich of the following term and definition pair is correctly matched? Group of answer choices pacemaker potential : spontaneous depolarization systole : relaxation ESV : the volume of blood in the ventricle after the final filling P wave : ventricle depolarizationarrow_forwardWhich of the following terms best describes end diastolic volume? Answers A - D A The volume of blood held in the atria В The volume of blood pumped out of the heart during one beat The volume of blood left in the heart after systole D The volume of blood in the heart after the ventricles have completely filledarrow_forward
- Describe the mechanical events of the cardiac cycle. (use terms like atrial systole, atrial diastole, ventricular diastole, ventricular systole, isovolumic ventricular contraction, isovolumic ventricular relaxation, ventricular ejection, period of rapid filling)arrow_forwardComplete the table below to describe what happens with the blood flow, volume, and pressure during the four phases of the cardiac cycle. Which valves open/close during these phases? Ventricular Isovolumetric Ventricular Isovolumetric Filling Contraction Ejection Relaxation Blood Flow Low Ventricular Volume Ventricular Pressure Aortic Pressurearrow_forwardPut these phases of the cardiac cycle in the correct order. opening of the semilunar valves isovolumetric contraction atrial systole begins closure of the AV valves ventricular filling is complete ventricular systole begins ventricular relaxation ventricular ejectionarrow_forward
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The Cardiovascular System: An Overview; Author: Strong Medicine;https://www.youtube.com/watch?v=Wu18mpI_62s;License: Standard youtube license