Human Physiology: An Integrated Approach (7th Edition)
7th Edition
ISBN: 9780321981226
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 25CC
Which chamber—atrium or ventricle—has higher pressure during the following phases of the cardiac cycle?
- (a) ventricular ejection
- (b) isovolumic ventricular relaxation
- (c) atrial and ventricular diastole
- (d) isovolumic ventricular contraction
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During the isovolumetric relaxation phase of ventricular diastole:
O a) Both ventricular volume and ventricular pressure decrease
O b) Both ventricular volume and ventricular pressure increase
O c) Ventricular volume and ventricular pressure remain constant
O d) Ventricular volume remains constant but ventricular pressure decreases
Which part of the conducting system of the heart is localized in the interventricular septum? (a) the atrioventricular node, (b) the sinoatrial node, (c) the atrioventricular bundle, (d) the Purkinje fibers.
Identify the correct order of the blood flow pathway?
(A) the pulmonary arteries carry oxygenated blood away from the pulmonary trunk
(B) the left ventricle pushes blood through the aortic valve
(C) the tricuspid valve takes blood from the left atrium to the left ventricle
(D)superior vena cava, opening of coronary sinus, and inferior vena cava take blood to the left atrium
Chapter 14 Solutions
Human Physiology: An Integrated Approach (7th Edition)
Ch. 14 - A cardiovascular system has what three major...Ch. 14 - What is the difference between (a) the pulmonary...Ch. 14 - Which is more important for determining flow...Ch. 14 - The two identical tubes below have the pressures...Ch. 14 - All four tubes below have the same driving...Ch. 14 - Two canals in Amsterdam are identical in size, but...Ch. 14 - What prevents electrical signals from passing...Ch. 14 - Prob. 8CCCh. 14 - Prob. 9CCCh. 14 - Compare the receptors and channels involved in...
Ch. 14 - If a myocardial contractile cell is placed in...Ch. 14 - A drug that blocks all Ca2+ channels in the...Ch. 14 - Which ions moving in what directions cause the...Ch. 14 - At the molecular level, what is happening during...Ch. 14 - Lidocaine is a molecule that blocks the action of...Ch. 14 - What does increasing K+ permeability do to the...Ch. 14 - A new cardiac drug called ivabradine selectively...Ch. 14 - Do you think that the Ca2+ channels in...Ch. 14 - What happens to the action potential of a...Ch. 14 - In an experiment, the vagus nerve, which carries...Ch. 14 - Name two functions of the AV node. What is the...Ch. 14 - Prob. 22CCCh. 14 - Occasionally an ectopic pacemaker {ktopos, out of...Ch. 14 - Prob. 24CCCh. 14 - Which chamberatrium or ventriclehas higher...Ch. 14 - Prob. 26CCCh. 14 - Prob. 27CCCh. 14 - Prob. 28CCCh. 14 - Prob. 29CCCh. 14 - Why does ventricular pressure shoot up suddenly at...Ch. 14 - Prob. 31CCCh. 14 - Prob. 32CCCh. 14 - A persons aortic valve opening has become...Ch. 14 - What contributions to understanding the...Ch. 14 - List three functions of the cardiovascular system.Ch. 14 - Prob. 3RQCh. 14 - Prob. 4RQCh. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Distinguish between the two members of each of the...Ch. 14 - Prob. 9RQCh. 14 - Prob. 10RQCh. 14 - What is the proper term for each of the following?...Ch. 14 - List the events of the cardiac cycle in sequence,...Ch. 14 - Prob. 13RQCh. 14 - Compare and contrast the structure of a cardiac...Ch. 14 - Prob. 15RQCh. 14 - Correlate the waves of an ECG with mechanical...Ch. 14 - Prob. 17RQCh. 14 - List and briefly explain four types of information...Ch. 14 - Define inotropic effect. Name two drugs that have...Ch. 14 - Prob. 20RQCh. 14 - Police Captain Jeffers has suffered a myocardial...Ch. 14 - Prob. 22RQCh. 14 - Prob. 23RQCh. 14 - Police Captain Jeffers in question 21 has an...Ch. 14 - Prob. 25RQCh. 14 - Prob. 26RQCh. 14 - Prob. 27RQCh. 14 - A person has a total blood volume of 5 L. Of this...
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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
- During isovolumetric ventricular contraction: a) all valves are open and pressure within the ventricles decreases. b) all valves are open and pressure within the ventricles increases. c) all valves are closed and pressure within the ventricles decreases. d) all valves are closed and pressure within the ventricles increases.arrow_forwardAs a result of ventricular depolarization (T wave), calcium ions are returned to the sarcoplasmic reticulum and ventricular muscles relax. As the myocardium relaxes, the semilunar valves close. At this time which of the following is true? Group of answer choices (A) ventricular pressure > aortic pressure > atrial pressure (B) atrial pressure > ventricular pressure > aortic pressure (C) aortic pressure > ventricular pressure > atrial pressure (D) aortic pressure > atrial pressure > ventricular pressurearrow_forwardIn a healthy adult blood flow in the left coronary artery is less during systole than diastole. This difference is best explained by a change in which of the following (a) Coronary arterial Po2 (b) Extravascular Pressure (c) Flow through the aortic valve (d) Parasympathtic nerve activity (e) Sympathetic nerve activityarrow_forward
- Which part of the intrinsic conduction system directly excites ventricular myocardial cells? In which direction does the depolarization wave travel across the ventricles?arrow_forwardDescribe the events leading up to contraction in a cardiac contractile cell. (Where does the stimulus to “contract” come from?)arrow_forwardWhy do the coronary arteries carry a greater blood flow during ventricular relaxation than they do during ventricular contraction?arrow_forward
- the cardiac cycle (More than one answer may be correct. Choose all that apply) a.) stroke volumes are around 70 – 80 ml b.) ventricular volumes are at a minimum at the beginning of diastole c.) ventricular volumes are at a minimum at the end of isovolumetric contraction d.) ventricular volumes are at a minimum just prior to atrial systole e.) ventricular volumes are at a minimum when both atrioventricular and semilunar valves are closedarrow_forwardThe simple squamous epithelium covering the valves of the heart is called(a) epicardium. (b) endocardium. (c) myocardium. (d) endothelium.arrow_forwardIf the length of the diastolic filling phase is reduced by one half because the heart rate increases, would only half as much blood enter the ventricles?arrow_forward
- 1a) Exercise immediately increases end-diastolic volume.True/False b)Mean arterial pressure is a relevant stimulus for the baroreceptor reflex.True/False c)Which of the following would be the most relevant efferent pathway for the regulation of cardiac output by the hormone epinephrine. (baroreceptor, axon, blood, ventricular cells, AV node, brainstem)arrow_forwardThe autonomic centers for cardiac function are located in, (a) myocardial tissue of the heart. (b) cardiac center of the medulla oblongata. (c) the cerebral cortex. (d) a, b, and c are correct.arrow_forwardA 'pulse deficit' (A) is determined by subtracting the value of the apical pulse from the radial pulse (B) is determined by subtracting the radial pulse from the apical pulse (C) may be caused by atrial fibrillation (D) may be caused by multiple premature ventricular contractions (E) A and C (F) B, C, and Darrow_forward
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