SEELEY'S ANATOMY+PHYSIOLOGY
12th Edition
ISBN: 9781260172195
Author: VanPutte
Publisher: RENT MCG
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Chapter 20.9, Problem 39AYP
Summary Introduction
To define:
The afterload and describe its effect on the pumping effectiveness of the heart.
Introduction:
The heart contains four hollow chambers: the right atrium, right ventricle, left atrium, and left ventricle. Each of these chambers plays a role in the continuous process of blood circulation.
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Detail the control of heart rate. Include: resting values, inherent values, how the ANS modulates, factors that affect heart rate, etc.?
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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.
Chapter 20 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
Ch. 20.1 - State the four functions of the heart.Ch. 20.2 - What is the approximate size and shape of the...Ch. 20.2 - Where is the heart located? How does this...Ch. 20.3 - Describe the parts of the pericardium and their...Ch. 20.3 - Describe the three layers of the heart wall, and...Ch. 20.3 - Name the chambers of the heart, and describe their...Ch. 20.3 - List the major blood vessels that enter and leave...Ch. 20.3 - Prob. 8AYPCh. 20.3 - Prob. 9AYPCh. 20.3 - Prob. 10AYP
Ch. 20.3 - Describe the openings of the right and left atria....Ch. 20.3 - Prob. 12AYPCh. 20.3 - Prob. 13AYPCh. 20.3 - Prob. 14AYPCh. 20.4 - Prob. 15AYPCh. 20.5 - Prob. 16AYPCh. 20.5 - Prob. 17AYPCh. 20.5 - Prob. 18AYPCh. 20.5 - Prob. 19AYPCh. 20.5 - Identify the parts of the conducting system of...Ch. 20.5 - Prob. 21AYPCh. 20.5 - Prob. 22AYPCh. 20.6 - Prob. 23AYPCh. 20.6 - Prob. 24AYPCh. 20.6 - Prob. 25AYPCh. 20.6 - Prob. 26AYPCh. 20.6 - What does an ECG measure? Nome the waves...Ch. 20.7 - Define systole and diastole.Ch. 20.7 - List the five periods of the cardiac cycle (see...Ch. 20.7 - Define isovolumetric. When does most ventricular...Ch. 20.7 - Prob. 31AYPCh. 20.7 - Prob. 32AYPCh. 20.7 - Prob. 33AYPCh. 20.8 - Prob. 34AYPCh. 20.8 - Explain the role of MAP in causing blood flow.Ch. 20.8 - Prob. 36AYPCh. 20.8 - Prob. 37AYPCh. 20.8 - Prob. 38AYPCh. 20.9 - Prob. 39AYPCh. 20.9 - Prob. 40AYPCh. 20.9 - Prob. 41AYPCh. 20.9 - Prob. 42AYPCh. 20.9 - Prob. 43AYPCh. 20.10 - Prob. 44AYPCh. 20.10 - Prob. 45AYPCh. 20.10 - What effect does an increase or a decrease...Ch. 20.10 - Prob. 47AYPCh. 20.11 - Prob. 48AYPCh. 20.11 - Prob. 49AYPCh. 20.11 - Prob. 50AYPCh. 20.11 - Prob. 51AYPCh. 20 - Which of these structures returns blood to the...Ch. 20 - Prob. 2RACCh. 20 - Prob. 3RACCh. 20 - Prob. 4RACCh. 20 - Prob. 5RACCh. 20 - Prob. 6RACCh. 20 - Action potentials pass from one cardiac muscle...Ch. 20 - During the transmission of action potentials...Ch. 20 - Given these structures of the conducting system of...Ch. 20 - Prob. 10RACCh. 20 - Prob. 11RACCh. 20 - The greatest amount of ventricular filling occurs...Ch. 20 - Prob. 13RACCh. 20 - Prob. 14RACCh. 20 - Prob. 15RACCh. 20 - Cardiac output is defined as blood pressure times...Ch. 20 - Pressure in the aorta is at its lowest a. at the...Ch. 20 - Prob. 18RACCh. 20 - Prob. 19RACCh. 20 - Prob. 20RACCh. 20 - Prob. 21RACCh. 20 - Increased parasympathetic stimulation of the heart...Ch. 20 - Prob. 23RACCh. 20 - Prob. 24RACCh. 20 - Prob. 25RACCh. 20 - Prob. 1CTCh. 20 - In most tissues, peak blood flow occurs during...Ch. 20 - Prob. 3CTCh. 20 - Prob. 4CTCh. 20 - A patient has tachycardia. Would you recommended a...Ch. 20 - Prob. 6CTCh. 20 - A doctor lets you listen to a patient's heart with...Ch. 20 - Explain why it is sufficient to replace the...Ch. 20 - Prob. 9CTCh. 20 - Prob. 10CTCh. 20 - Prob. 11CT
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- High blood pressure would be a result of ___________ . a high cardiac output and high peripheral resistance a high cardiac output and low peripheral resistance a low cardiac output and high peripheral resistance a low cardiac output and low peripheral resistancearrow_forwardExplain the major mechanisms involved in regulation of cardiac performance.arrow_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_forward
- Explain how the heart is a double pump and why this is significantarrow_forwardDefine the terms depolarization and repolarization with respect to heart’s activity.arrow_forwardDescribe the functional differences in the effects of the sympathetic and parasympathetic divisions of the autonomic nervous system on the activity of the heart.arrow_forward
- Predict: Because of a reduced blood supply to the AV node, the delay in the conduction of action potentials from the SA node to the AV node is increased slightly. All other areas of the conducting system of the heart are functioning normally. Predict how this affects the normal rhythm of the heart.arrow_forwardExplain the generation of cardiac action potential. Describe the cardiacconduction system and cardiovascular system briefly with necessary figures.arrow_forwardDescribe the conduction pathway of the heart, and discuss two examples of disease states where conduction is altered Provide examples provide stepsarrow_forward
- explain the major mechanism involved in the regulation of cardiovasular changes during exercise and bleeding.arrow_forwardDescribe the redistribution of cardiac output during exercise to the CNS, coronary, splanchnic, cutaneous, and skeletal muscle vascular beds during sustained exercise (distance running).arrow_forwardPrompt: Plot the tension in the left ventricle over the length of cardiac cycle, assuming that only the diameter changes during the cardiac cycle. Remember: -ventricular filling : small pressure changes (almost none) but radius change -ventricular isovolumetric contraction: big pressure changes (increasing over time) and radius changes -ventricular contraction: small pressure changes (but significant) and radius change -ventricular isovolumetric relaxation: big pressure changes (decreasing over time) and radius changes HINT: when calculating tension deltaP it is the difference between the pressure inside vs the outside of the ventricle wall. Relationship between pressure, volume and ECG Systole ejection Pressure (mmHg) Volume (mL) ECG 120 80 40 130 90+ Aortic valve opens Mitral valve closes EDV Ejection Contraction Aortic valve closes Diastole filling Mitral valve opens Filling --ESV Relaxation Filling Aortic pressure Left ventricular pressure Left atrial pressure Left ventricular…arrow_forward
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