Essentials of Human Anatomy & Physiology (12th Edition)
12th Edition
ISBN: 9780134395326
Author: Elaine N. Marieb, Suzanne M. Keller
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 5MC
Atrial repolarization coincides in time with the
a. P wave.
b. T wave.
c. QRS wave.
d. P-Q interval.
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Students have asked these similar questions
Which of the following statements is true about the SA (sinoatrial) node?
a. The action potential created by the pacemaker cells of the SA node directly stimulates the contractile cells of both the atria and ventricles.
b. The rate of spontaneous depolarization of nodal cells is the fastest in the SA node.
c. Pacemaker cells in the SA node form a pathway between the SA and AV nodes.
d. The pacemaker cells, which establish the heart rate, are located only in the SA node.
Which cell types are associated with spontaneous action potential generation in the absence of an external stimulus from other tissues.
A.
Sino-Atrial node cells (SA node).
B.
Atrial cells
C.
Ventricular cells.
D.
Endothelial cells.
E.
A and D.
On an ECG, if every other P wave (e.g., every even is, and every odd is not) is NOT followed by the QRS complex, this is:
A. first degree AV block
B. second degree AV block
C. third degree AV block
D. atrial fibrillation
Chapter 11 Solutions
Essentials of Human Anatomy & Physiology (12th Edition)
Ch. 11 - More than one choice may apply. Pulmonary veins...Ch. 11 - Given a volume of 150 ml at the end of diastole, a...Ch. 11 - Which of the following depolarizes next after the...Ch. 11 - During atrial systole, a. the atrial pressure...Ch. 11 - 5. Atrial repolarization coincides in time with...Ch. 11 - Soon after the onset of ventricular systole, the...Ch. 11 - The base of the heart is its ______ surface. a....Ch. 11 - 8. In comparing a parallel artery and vein, you...Ch. 11 - Prob. 9MCCh. 11 - Prob. 10MC
Ch. 11 - Prob. 11MCCh. 11 - 12. Which layer of the artery wall thickens most...Ch. 11 - Which of the following are associated with aging?...Ch. 11 - An increase in BP would be caused by all of the...Ch. 11 - The most external part of the pericardium is the...Ch. 11 - Prob. 16MCCh. 11 - Prob. 17MCCh. 11 - Prob. 18MCCh. 11 - 19. Draw a diagram of the heart showing the three...Ch. 11 - Prob. 20SAECh. 11 - Prob. 21SAECh. 11 - 22. Define systole and diastole.
Ch. 11 - Prob. 23SAECh. 11 - Prob. 24SAECh. 11 - Prob. 25SAECh. 11 - 26. Name three different factors that increase...Ch. 11 - Prob. 27SAECh. 11 - Describe the structure of capillary walls.Ch. 11 - Prob. 29SAECh. 11 - Name three factors that are important in promoting...Ch. 11 - Prob. 31SAECh. 11 - Trace a drop of blood from the left ventricle of...Ch. 11 - Prob. 33SAECh. 11 - 34. In a fetus, the liver and lungs are almost...Ch. 11 - Prob. 35SAECh. 11 - Prob. 36SAECh. 11 - Prob. 37SAECh. 11 - 38. Two elements determine blood pressure—the...Ch. 11 - Prob. 39SAECh. 11 - Prob. 40SAECh. 11 - Prob. 41SAECh. 11 - Explain why blood flow in arteries is pulsatile...Ch. 11 - Explain the relationship between the...Ch. 11 - 44. Which type of blood vessel is most important...Ch. 11 - Prob. 45SAECh. 11 - John is a 30-year-old man who is overweight and...Ch. 11 - 47. Mrs. Hamad, a middle-aged woman, is admitted...Ch. 11 - Hannah, a 14-year-old girl undergoing a physical...Ch. 11 - Prob. 49CTCh. 11 - Prob. 50CTCh. 11 - Mr. Grimaldi was previously diagnosed as having a...Ch. 11 - Prob. 52CTCh. 11 - The guards at the royal palace in London stand at...
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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 of the following is true of the EKG? A. Depolarization of the atria cannot be seen on the EKG B. Repolarization of the atria cannot be seen on the EKG. C. Depolorization of the ventricles cannot be seen on the EKG. D. Repolorazition of the ventricles cannot be seen on the EKG.arrow_forwardWithin the T-P interval of the EKG... a. The 2nd heart sound is heard b. the semilunar valves are open c. Ventricular pressure is higher than atrial pressure d. Ventricular cardiomyocytes are relaxed e. L-type calcium current is dominant in the ventricular cardiomyocytesarrow_forwardThe QRS wave of an ECG is produced by. a. depolarization of the atria. b. repolarization of the atria. c. depolarization of the ventricles. d. repolarization of the ventricles.arrow_forward
- A PR interval of less than 0.12 seconds indicates that the pacemaker site of the P wave is in the: A. AV junction B. Lower right atrium near AV node C. Upper right atrium with an accessory AV pathway present WPW D. All of the abovearrow_forwardAtrial flutter is characterized by A. An atrial rate slower than the ventricular rate B. Waves with a saw tooth or picket fence pattern C. An atrial rate between 160 and 220 beats per minute D. All of the abovearrow_forwardAn arrhythmia originating in pacemakers that shift back and forth between the SA node and an ectopic pacemaker in the atria or AV junction is called a(n): A. Multifocal atrial tachycardia B. Wandering atrial pacemaker C. Paroxysmal supraventricular tachycardia (PSVT) D. All of the abovearrow_forward
- Using the ECG recording provided below, how do we know that this extrasystole event (i.e., indicated by the arrow) is occurring in the ventricles and not the atria? a. None of the options are correct b. Extrasystole event is smaller in amplitude than the QRS complex c.Event occurs after a T-wave d.Large ECG amplitude compared with the P-wave e.Event occurs after a P-wavearrow_forwardThe QRS-complex of the ECG is generated by the depolarization of the AV-Node & Ventricular Myocardium. A. true B. falsearrow_forwardThe QRS wave of an ECG (or EKG) represents: a. depolarization of the ventricles. b. Depolarization and repolarization of the ventricles. c. Depolarization of the atria and ventricles. d. depolarization of the atria.arrow_forward
- An ECG measures a. changes in electrical potential during the cardiac cycle. b. Ca2+ concentration of the ventricles in diastole. c. the force of contraction of the atria during systole. d. the volume of blood being pumped during the contraction cycle.arrow_forwardwhich of the following mechanisms contributes most to the deterioration of myocardial perfusion in patients with a progressively dilating left ventricle and a cycle of gradual decompensation. A. decreasing left ventricular radius B. decreasing peripheral vascular resistance C. decreasing vestibular pressure D. increasing left ventricular wall tension E. increasing left ventricular wall thicknessarrow_forwardWhich statement about atrial contraction is true. A the end diastolic volume is the volume of blood that enters the ventricles during atrial contraction B the end diastolic volume is the volume of blood in the atria at the end of diastole C most of the filling of the ventricles occurs during atrial contraction D when atrial contraction begins the ventricles are already about 80% fullarrow_forward
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