Essentials of Human Anatomy & Physiology (12th Edition)
12th Edition
ISBN: 9780134395326
Author: Elaine N. Marieb, Suzanne M. Keller
Publisher: PEARSON
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Chapter 11, Problem 25SAE
Summary Introduction
To review:
The elements belonging to intrinsic conduction system, in order, starting with the pacemaker.
Introduction:
The intrinsic conduction system is responsible for setting up of the basic rhythm of the heart beats, which is composed of autorhythmic cardiac cells that facilitates the initiation of action potentials. This action potential is further carried out through the heart in the form of impulses.
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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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- Label the hearts main parts in the diagram below.arrow_forwardA patient suffering from hypertension may receive drugs that decrease the hearts output, dilate arterioles, or increase urine production. In each case, how would the drug treatment help relieve hypertension?arrow_forwardClusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as ________. baroreceptors angioreceptors the cardiomotor mechanism the cardiovascular centerarrow_forward
- correlate the cardiac action potential with the normal ECG tracings. compare the patient's ECG tracing with the discussionarrow_forwardA man was attached to a cardiac monitor and was noted to be in sinus rhythm of 75 beats per minute. Name the main structures of the intrinsic conduction system and trace the spread of cardiac impulse and blood flow through the heart.arrow_forwardA cardiologist observed an enlarged QR wave in the ECG of a patient. What does it indicate?arrow_forward
- The standard EKG consists of 10 sensors that record 12 leads of the heart’s electrical activity from different angles, allowing for a thorough three-dimensional interpretation of its activity. This is transmitted by the electrodes to the equipment to be interpreted and is used to diagnose cardiac medical conditions. In case of an abnormal EKG, the second step would be to use a Holter monitor. How would you explain to your classmates how to perform an EKG (steps)? Where will you place the electrodes when performing and EKG? Why? What are the different lead types, connections, and placements? When you conclude an EKG, what are the different components that you need to observe and confirm before you disconnect the patient? Can you explain the difference between normal, abnormal, and artifacts? What is a Holter monitor? Under what circumstances would one be ordered for a patient? How do you use a Holter monitor? Educate a patient: What you will do before, during, and after an…arrow_forwardNumber the following structures of the cardiac conduction system in the normal order of depolarization (1 to 5). _______________ AV bundle (of His) _______________ AV node _______________ Purkinje (conduction) fibers _______________ Right and left bundle branches _______________ SA nodearrow_forwardIn the following graphs of pacemaker potential recordings from the SA node, what graph represents what (ie parasympathetic nerve effect)arrow_forward
- A normal patient has an ECG monitor attached to him/her as he/she starts exercises at the gym. The ECG recording shows a significant increase in heart rate to 220 beats/min after 20 minutes of strenuous exercise. What are the consequences and why? To answer this, be sure to address blood flow through the heart and what is happening to the blood flow, electrical impulses and pressures during each phase of the ECG (p,q,r,s,t).arrow_forwardIn an EKG, what does the QRS wave indicate? electrical signal over the ventricles first heart sound second heart sound electrical signal over the atriaarrow_forwardIn the image above, the dotted line represents a normal pacemaker potential. Describe the steps involved in a pacemaker potential. What would happen for the pacemaker potential to shift to A? B? A,arrow_forward
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